Home » Posts tagged '2020 APPROVALS' (Page 4)

Tag Archives: 2020 APPROVALS

Avapritinib, アバプリチニブ , авапритиниб , أفابريتينيب ,

January 13, 2020 9:38 am / Leave a comment

ChemSpider 2D Image | avapritinib | C26H27FN10

Avapritinib

BLU-285, BLU285

Antineoplastic, Tyrosine kinase inhibitor

アバプリチニブ

авапритиниб [Russian] [INN]

أفابريتينيب [Arabic] [INN]

(1S)-1-(4-fluorophenyl)-1-[2-[4-[6-(1-methylpyrazol-4-yl)pyrrolo[2,1-f][1,2,4]triazin-4-yl]piperazin-1-yl]pyrimidin-5-yl]ethanamine

(1S)-1-(4-Fluorophenyl)-1-(2-{4-[6-(1-methyl-1H-pyrazol-4-yl)pyrrolo[2,1-f][1,2,4]triazin-4-yl]-1-piperazinyl}-5-pyrimidinyl)ethanamine

10613

1703793-34-3 [RN]

513P80B4YJ

5-Pyrimidinemethanamine, α-(4-fluorophenyl)-α-methyl-2-[4-[6-(1-methyl-1H-pyrazol-4-yl)pyrrolo[2,1-f][1,2,4]triazin-4-yl]-1-piperazinyl]-, (αS)-

(S)-1-(4-fluorophenyl)-1-(2-(4-(6-(1-methyl-1H-pyrazol-4-yl)pyrrolo[2,1-f][1,2,4]triazin-4-yl)piperazin-1-yl)pyrimidin-5-yl)ethan-1-amine

(αS)-(4-fluorophenyl)-α-methyl-2-[4-[6-(1-methyl-1H-pyrazol-4-yl)pyrrolo[2,1-f][1,2,4]triazin-4-yl]-1-piperazinyl]-5-pyrimidinemethanamine

Formula	C26H27FN10
CAS	1703793-34-3
Mol weight	498.558

No.	Drug Name	Active Ingredient	Approval Date	FDA-approved use on approval date*
1.	Ayvakit	avapritinib	1/9/2020	To treat adults with unresectable or metastatic gastrointestinal stromal tumor (GIST)

PRIORITY; Orphan, NDA 212608

Avapritinib, sold under the brand name Ayvakit, is a medication used for the treatment of tumors due to one specific rare mutation: It is specifically intended for adults with unresectable or metastatic ( y) gastrointestinal stromal tumor (GIST) that harbor a platelet-derived growth factor receptor alpha (PDGFRA) exon 18 mutation.^[1]

Common side effects are edema (swelling), nausea, fatigue/asthenia (abnormal physical weakness or lack of energy), cognitive impairment, vomiting, decreased appetite, diarrhea, hair color changes, increased lacrimation (secretion of tears), abdominal pain, constipation, rash. and dizziness.^[1]

Ayvakit is a kinase inhibitor.^[1]

History

The U.S. Food and Drug Administration (FDA) approved avapritinib in January 2020.^[1] The application for avapritinib was granted fast track designation, breakthrough therapy designation, and orphan drug designation.^[1] The FDA granted approval of Ayvakit to Blueprint Medicines Corporation.^[1]

Avapritinib was approved based on the results from the Phase I NAVIGATOR^[2]^[3] clinical trial involving 43 patients with GIST harboring a PDGFRA exon 18 mutation, including 38 subjects with PDGFRA D842V mutation.^[1] Subjects received avapritinib 300 mg or 400 mg orally once daily until disease progression or they experienced unacceptable toxicity.^[1] The recommended dose was determined to be 300 mg once daily.^[1] The trial measured how many subjects experienced complete or partial shrinkage (by a certain amount) of their tumors during treatment (overall response rate).^[1] For subjects harboring a PDGFRA exon 18 mutation, the overall response rate was 84%, with 7% having a complete response and 77% having a partial response.^[1] For the subgroup of subjects with PDGFRA D842V mutations, the overall response rate was 89%, with 8% having a complete response and 82% having a partial response.^[1] While the median duration of response was not reached, 61% of the responding subjects with exon 18 mutations had a response lasting six months or longer (31% of subjects with an ongoing response were followed for less than six months).^[1]

PATENT

WO 2015057873

https://patents.google.com/patent/WO2015057873A1/en

Example 7: Synthesis of (R)-l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl-lH-pyrazol-4- yl)pyrrolo[2, 1 -f\ [ 1 ,2,4] triazin-4-yl)piperazin- 1 -yl)pyrimidin-5-yl)ethanamine and (S)- 1 – (4- fluorophenyl)- l-(2-(4-(6-(l-methyl-lH-pyrazol-4-yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)ethanamine (Compounds 43 and 44)

Step 1 : Synthesis of (4-fluorophenyl)(2-(4-(6-(l-methyl- lH-pyrazol-4-yl)pyrrolo[2,l- f] [ 1 ,2,4] triazin-4-yl)piperazin- 1 -yl)pyrimidin-5-yl)methanone:

4-Chloro-6-(l-methyl- lH-pyrazol-4-yl)pyrrolo[2,l-/] [l,2,4]triazine (180 mg, 0.770 mmol), (4-fluorophenyl)(2-(piperazin-l-yl)pyrimidin-5-yl)methanone, HC1 (265 mg, 0.821 mmol) and DIPEA (0.40 mL, 2.290 mmol) were stirred in 1,4-dioxane (4 mL) at room temperature for 18 hours. Saturated ammonium chloride was added and the products extracted into DCM (x2). The combined organic extracts were dried over Na₂S0₄, filtered through Celite eluting with DCM, and the filtrate concentrated in vacuo. Purification of the residue by MPLC (25- 100% EtOAc-DCM) gave (4-fluorophenyl)(2-(4-(6-(l-methyl-lH-pyrazol-4-yl)pyrrolo[2,l- ] [l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)methanone (160 mg, 0.331 mmol, 43 % yield) as an off-white solid. MS (ES+) C₂5H₂₂FN₉0 requires: 483, found: 484 [M + H]⁺.

Step 2: Synthesis of (5,Z)-N-((4-fluorophenyl)(2-(4-(6-(l-methyl- lH-p razol-4-yl)p rrolo[2, l- ] [l,2,4]triazin-4- l)piperazin- l-yl)pyrimidin-5-yl)methylene)-2-methylpropane-2-sulfinamide:

(S)-2-Methylpropane-2-sulfinamide (110 mg, 0.908 mmol), (4-fluorophenyl)(2-(4-(6-(l- methyl- lH-pyrazol-4-yl)pyrrolo[2,l-/][l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5- yl)methanone (158 mg, 0.327 mmol) and ethyl orthotitanate (0.15 mL, 0.715 mmol) were stirred in THF (3.2 mL) at 70 °C for 18 hours. Room temperature was attained, water was added, and the products extracted into EtOAc (x2). The combined organic extracts were washed with brine, dried over Na₂S0₄, filtered, and concentrated in vacuo while loading onto Celite. Purification of the residue by MPLC (0- 10% MeOH-EtOAc) gave (5,Z)-N-((4-fluorophenyl)(2-(4-(6-(l-methyl- lH-pyrazol-4-yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin-l-yl)pyrimidin-5-yl)methylene)-2- methylpropane-2-sulfinamide (192 mg, 0.327 mmol, 100 % yield) as an orange solid. MS (ES+) C2₉H₃iFN₁₀OS requires: 586, found: 587 [M + H]⁺.

Step 3: Synthesis of (_lS’)-N-(l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl- lH-pyrazol-4- l)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin-l-yl)pyrimidin-5-yl)ethyl)-2-methylpropane-2-

(_lS’,Z)-N-((4-Fluorophenyl)(2-(4-(6-(l-methyl-lH-pyrazol-4-yl)pyrrolo[2,l- ] [l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)methylene)-2-methylpropane-2-sulfinamide (190 mg, 0.324 mmol) was taken up in THF (3 mL) and cooled to 0 °C. Methylmagnesium bromide (3 M solution in diethyl ether, 0.50 mL, 1.500 mmol) was added and the resulting mixture stirred at 0 °C for 45 minutes. Additional methylmagnesium bromide (3 M solution in diethyl ether, 0.10 mL, 0.300 mmol) was added and stirring at 0 °C continued for 20 minutes. Saturated ammonium chloride was added and the products extracted into EtOAc (x2). The combined organic extracts were washed with brine, dried over Na₂S0₄, filtered, and concentrated in vacuo while loading onto Celite. Purification of the residue by MPLC (0-10% MeOH-EtOAc) gave (_lS’)-N-(l-(4-fluorophenyl)-l-(2-(4-(6-(l-methyl- lH-pyrazol-4-yl)pyrrolo[2, l- ] [l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)ethyl)-2-methylpropane-2-sulfinamide (120 mg, 0.199 mmol, 61.5 % yield) as a yellow solid (mixture of diastereoisomers). MS (ES+) C₃oH₃₅FN₁₀OS requires: 602, found: 603 [M + H]⁺. Step 4: Synthesis of l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl- lH-pyrazol-4-yl)pyrrolo[2,l- f\ [ 1 ,2,4] triazin-4- l)piperazin- 1 -yl)pyrimidin-5-yl)ethanamine:

(S)-N- ( 1 – (4-Fluorophenyl)- 1 -(2- (4- (6-( 1 -methyl- 1 H-pyrazol-4-yl)pyrrolo [2,1- /] [l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)ethyl)-2-methylpropane-2-sulfinamide (120 mg, 0.199 mmol) was stirred in 4 M HCl in 1,4-dioxane (1.5 mL)/MeOH (1.5 mL) at room temperature for 1 hour. The solvent was removed in vacuo and the residue triturated in EtOAc to give l-(4-fluorophenyl)- l-(2-(4-(6-(l -methyl- lH-pyrazol-4-yl)pyrrolo[2, l-/][l,2,4]triazin-4- yl)piperazin- l-yl)pyrimidin-5-yl)ethanamine, HCl (110 mg, 0.206 mmol, 103 % yield) as a pale yellow solid. MS (ES+) C₂₆H₂₇FN₁₀requires: 498, found: 482 [M- 17 + H]+, 499 [M + H]⁺.

Step 5: Chiral separation of (R)-l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl- lH-pyrazol-4- yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin-l-yl)pyrimidin-5-yl)ethanamine and (5)-1-(4- fluorophenyl)- l-(2-(4-(6-(l-methyl-lH-pyrazol-4-yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin- 1 -yl)pyrimidin- -yl)ethanamine:

The enantiomers of racemic l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl- lH-pyrazol-4- yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin-l-yl)pyrimidin-5-yl)ethanamine (94 mg, 0.189 mmol) were separated by chiral SFC to give (R)-l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl-lH- pyrazol-4-yl)pyrrolo[2, l-/][l,2,4]triazin-4-yl)piperazin- l-yl)pyrimidin-5-yl)ethanamine (34.4 mg, 0.069 mmol, 73.2 % yield) and (_lS^,)-l-(4-fluorophenyl)- l-(2-(4-(6-(l-methyl-lH-pyrazol-4- yl)pyrrolo[2, l-/] [l,2,4]triazin-4-yl)piperazin-l-yl)pyrimidin-5-yl)ethanamine (32.1 mg, 0.064 mmol, 68.3 % yield). The absolute stereochemistry was assigned randomly. MS (ES+)

C₂₆H₂₇FN₁₀ requires: 498, found: 499 [M + H]⁺.

References

^ Jump up to:^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m “FDA approves the first targeted therapy to treat a rare mutation in patients with gastrointestinal stromal tumors”. U.S. Food and Drug Administration (FDA) (Press release). 9 January 2020. Archived from the original on 11 January 2020. Retrieved 9 January 2020. This article incorporates text from this source, which is in the public domain.
^ “Blueprint Medicines Announces FDA Approval of AYVAKIT (avapritinib) for the Treatment of Adults with Unresectable or Metastatic PDGFRA Exon 18 Mutant Gastrointestinal Stromal Tumor”. Blueprint Medicines Corporation (Press release). 9 January 2020. Archived from the original on 11 January 2020. Retrieved 9 January 2020.
^ “Blueprint Medicines Announces Updated NAVIGATOR Trial Results in Patients with Advanced Gastrointestinal Stromal Tumors Supporting Development of Avapritinib Across All Lines of Therapy”. Blueprint Medicines Corporation (Press release). 15 November 2018. Archived from the original on 10 January 2020. Retrieved 9 January 2020.

External links

“Avapritinib”. Drug Information Portal. U.S. National Library of Medicine (NLM).

Avapritinib
Clinical data
Trade names	Ayvakit
Other names	BLU-285, BLU285
License data	US FDA: Ayvakit
Routes of administration	By mouth
Drug class	Antineoplastic agents
ATC code	none
Legal status
Legal status	US: ℞-only
Identifiers
CAS Number	1703793-34-3
PubChem CID	118023034
DrugBank	DB15233
ChemSpider	58828673
UNII	513P80B4YJ
KEGG	D11279
Chemical and physical data
Formula	C₂₆H₂₇FN₁₀
Molar mass	498.570 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES [hide] CC(C1=CC=C(C=C1)F)(C2=CN=C(N=C2)N3CCN(CC3)C4=NC=NN5C4=CC(=C5)C6=CN(N=C6)C)N
InChI [hide] InChI=1S/C26H27FN10/c1-26(28,20-3-5-22(27)6-4-20)21-13-29-25(30-14-21)36-9-7-35(8-10-36)24-23-11-18(16-37(23)33-17-31-24)19-12-32-34(2)15-19/h3-6,11-17H,7-10,28H2,1-2H3/t26-/m0/s1 Key:DWYRIWUZIJHQKQ-SANMLTNESA-N

///////Avapritinib, 2020 APPROVALS, PRIORITY, Orphan, BLU-285, BLU285, FDA 2020, Ayvakit, アバプリチニブ , авапритиниб , أفابريتينيب ,

Relugolix レルゴリクス

January 21, 2019 10:09 am / Leave a comment

ChemSpider 2D Image | Relugolix | C29H27F2N7O5S

Relugolix (TAK-385), RVT 601

レルゴリクス

UPDATE FDA APPROVED, 12/18/2020, Orgovyx

To treat advanced prostate cancer
Press Release

Formula	C29H27F2N7O5S
CAS	737789-87-6
Mol weight UNII	623.6304 UNII-P76B05O5V6

Formula

C29H27F2N7O5S

CAS

737789-87-6

Mol weight

UNII

623.6304

UNII-P76B05O5V6

2019/1/8 PMDA JAPAN APPROVED, Relumina

1-{4-[1-(2,6-Difluorobenzyl)-5-[(dimethylamino)methyl]-3-(6-methoxy-3-pyridazinyl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl]phenyl}-3-methoxyurea

Urea, N-[4-[1-[(2,6-difluorophenyl)methyl]-5-[(dimethylamino)methyl]-1,2,3,4-tetrahydro-3-(6-methoxy-3-pyridazinyl)-2,4-dioxothieno[2,3-d]pyrimidin-6-yl]phenyl]-N’-methoxy-

737789-87-6 [RN]

9628

P76B05O5V6

Originator Takeda
Developer Myovant Sciences; Takeda; Takeda Oncology
Class Analgesics; Antineoplastics; Ketones; Pyrimidines; Small molecules
Mechanism of Action LHRH receptor antagonists

Preregistration Uterine leiomyoma
Phase III Pain; Prostate cancer
No development reported Solid tumours

08 Nov 2018 Myovant announces intention to submit NDA for Uterine leiomyoma in Q3 of 2019
08 Nov 2018 Myovant Sciences completes enrollment in the phase III LIBERTY 1 trial for Uterine leiomyoma (Combination therapy) in USA (PO)(NCT03049735)
25 Oct 2018 Myovant Sciences completes enrolment in its phase III HERO trial for Prostate cancer (Late-stage disease) in Denmark, Australia, Austria, Belgium, Canada, United Kingdom, USA, Japan, Taiwan, Sweden, Spain, Slovakia, New Zealand, Netherlands, South Korea, Germany, France and Finland (PO) (NCT03085095)

Image result for Relugolix

Relugolix has been used in trials studying the treatment of Endometriosis, Prostate Cancer, Uterine Fibroids, and Androgen Deprivation Treatment-naïve Nonmetastatic Prostate Cancer.

Relugolix (developmental code names RVT-601, TAK-385) is a gonadotropin-releasing hormone antagonist (GnRH antagonist) medication which is under development by Myovant Sciences and Takeda for the treatment of endometriosis, uterine fibroids, and prostate cancer.^[1]^[2]^[3]^[4]^[5]^[6]^[7] Unlike most other GnRH modulators, but similarly to elagolix, relugolix is a non-peptide and small-molecule compound and is orally active.^[6]^[7] As of July 2018, it is in the pre-registration phase of development for uterine fibroids and is in phase III clinical trials for endometriosis and prostate cancer.^[1]

Pharmacology

Pharmacodynamics

Relugolix is a selective antagonist of the gonadotropin-releasing hormone receptor (GnRHR) (IC₅₀ = 0.12 nM).^[6]^[7]^[8]

A single oral administration of relugolix at a dose of 3 mg/kg has been found to suppress luteinizing hormone (LH) levels for more than 24 hours in castrated cynomolgus monkeys, indicating a long duration of action.^[6] The drug (80–160 mg/day) has been found to reduce testosterone levels to sustained castrate levels in men with once-daily administration.^[8] Lower dosages (10–40 mg/day) are being studied in the treatment of endometriosis and uterine fibroids to achieve partial sex hormone suppression.^[4] The reasoning behind partial suppression for these conditions is to reduce the incidence and severity of menopausal symptoms such as hot flushes and to avoid bone mineral density changes caused by estrogen deficiency that can eventually lead to osteoporosis.^[4]^[9]

History

Relugolix was first described in 2004.^[10]^[6] It superseded sufugolix, which was developed by the same group.^[6]

Society and culture

Generic names

Relugolix is the generic name of the drug and its INN and USAN.^[11] It is also known by its developmental code names RVT-601 and TAK-385.^[1]^[11]

SYN

Journal of Medicinal Chemistry, 54(14), 4998-5012; 2011

PATENT

http://www.google.co.in/patents/EP1591446A1?cl=en

(Production Method 1)

http://www.google.co.in/patents/EP1591446A1?cl=en

Production of N-(4-(1-(2,6-difluorobenzyl)-5-((dimethylamino)methyl)-3-(6-methoxy-3-pyridazinyl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)-N’-methoxyurea

The similar reaction as described in Example 4 by using the compound (100 mg, 0.164 mmol) obtained in Reference Example 54 and methyl iodide (0.010 ml, 0.164 mmol) gave the title compound (17.3 mg, 17 %) as colorless crystals.
¹ H-NMR(CDCl₃) δ: 2.15 (6H, s), 3.6-3.8 (2H, m), 3.82 (3H, s), 4.18 (3H, s), 5.35 (2H, s), 6.92 (2H, t, J = 8.2 Hz), 7.12 (1H, d, J = 8.8 Hz), 7.2-7.65 (7H, m), 7.69 (1H, s).

PAPER

Discovery of 1-{4-[1-(2,6-difluorobenzyl)-5-[(dimethylamino)methyl]-3-(6-methoxypyridazin-3-yl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl]phenyl}-3-methoxyurea (TAK-385) as a potent, orally active, non-peptide antagonist of the human gonadotropin-releasing hormone receptor
J Med Chem 2011, 54(14): 4998. http://pubs.acs.org/doi/full/10.1021/jm200216q

1-{4-[1-(2,6-Difluorobenzyl)-5-[(dimethylamino)methyl]-3-(6-methoxypyridazin-3-yl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl]phenyl}-3-methoxyurea (16b)

Compound 16b was prepared in 44% yield from 15j by a procedure similar to that described for16a as colorless crystals, mp 228 °C (dec). ¹H NMR (CDCl₃): δ 2.15 (6H, s), 3.60–3.80 (2H, m), 3.82 (3H, s), 4.18 (3H, s), 5.35 (2H, s), 6.92 (2H, t, J = 8.2 Hz), 7.12 (1H, d, J = 8.8 Hz), 7.20–7.65 (7H, m), 7.69 (1H, s). LC–MS m/z: 624.0 [M + H⁺], 621.9 [M + H^–]. Anal. (C₂₉H₂₇F₂N₇O₅S) C, H, N.

Abstract Image tak 385

http://pubs.acs.org/doi/suppl/10.1021/jm200216q/suppl_file/jm200216q_si_001.pdf

PATENT

WO-2014051164

Method for the production of TAK-385 or its salt and crystals starting from 6-(4-aminophenyl)-1-(2,6-difluorobenzyl)-5-dimethylaminomethyl-3-(6-methoxypyridazin-3-yl) thieno[2,3-d] pyrimidine-2,4 (1H,3H)-dione or its salt. Takeda Pharmaceutical is developing relugolix (TAK-385), an oral LHRH receptor antagonist analog of sufugolix, for the treatment of endometriosis and uterine fibroids. As of April 2014, the drug is in Phase 2 trails. See WO2010026993 claiming method for improving the oral absorption and stability of tetrahydro-thieno[2,3-d]pyrimidin-6-yl]-phenyl)-N’-methoxy urea derivatives.

PATENT

https://patents.google.com/patent/WO2015062391A1/en

Endometriosis is a common estrogen-dependent gynecological diseases, often occurs in women during their childbearing years, and its mechanism is unclear. Complex and difficult to diagnose the cause of the symptoms of endometriosis is unknown, serious block to the discovery of effective therapies. Currently, endometriosis primarily by laparoscopy diagnosis, and treatment by surgery, or pill, or progesterone receptor agonists of GnRH reduce estrogen levels to control.

Currently the high incidence of endometriosis, Datamonitor 2009 year data show that only two countries, India and China, the number of female patients suffering from endometriosis had more than 68 million (31,288,000 India, China 3753.5 million) passengers, while the national prevalence of the number seven major markets have more than 17 million. Datamonitor expects 2009 to 2018, endometriosis market from 2009 to $ 764 million (US $ 596 billion and the EU $ 117 million, Japan US $ 051 million) in 2018 increased to US $ 1.156 billion (US 8.44 billion dollars, 206 million US dollars the European Union, Japan $ 106 million), while the Chinese market will have more room for growth.

Gonadotropin-releasing hormone (Gonadoliberin; gonadotropin releasing hormone; GnRH), also known as luteinizing hormone releasing hormone (LHRH), is synthesized by neuroendocrine cells of the hypothalamus hormones decapeptide (pGlu-His-Trp-Ser-Tyr-Gly- Leu-Arg-Pro-Gly-NH2), a central regulator of reproductive endocrine system. Which conveys the circulatory system through hypothalamus-pituitary portal to the pituitary, bind to the cells of the anterior pituitary GnRH receptor, such as gonadotropin luteinizing hormone (Luteinizing Hormone, LH) and FSH (Follicle-Stimulating Hormone, FSH ) secretion and release, regulation of normal development and corpus luteum of the ovary, hypothalamic – pituitary – gonadal axis plays an important role. GnRH receptors capable of activating the G protein coupled calcium phosphatidylinositol second messenger system exert their regulatory role, and LH is adjusted to produce steroids, FSH regulating development of the male and female follicle spermatogenesis.

LH and FSH are released into the circulation, and combined with the ovaries or testes specific cell receptors, stimulating the production of steroids. The presence of sex steroids, diseases such as endometriosis, uterine fibroids, prostate cancer and exacerbations, to be given long-acting GnRH receptor agonists and antagonists for treatment control peptides.

Peptide GnRH receptor antagonists include linear peptides (US 5,171,835) GnRH-derived, cyclic hexapeptide derivatives (US 2002/0065309), a bicyclic peptide derivative (Journal of Medicinal Chemistry, 1993; 36: 3265-73), etc. ; and GnRH receptor peptide agonists include leuprolide (leuprorelin, pGlu-His-Trp-Ser-Tyr-d-Leu-Leu-Arg-Pro-NHEt). However, there are many problems including oral absorbability, dosage form, dose volume, drug stability, sustained action, and metabolic stability of the peptide-type compound to be resolved. But the main reason small molecule GnRH receptor antagonists of peptide-based therapy is superior to the existing method is that small molecule GnRH receptor antagonist may be orally administered directly, convenient. Studies have shown that small molecule antagonists of endometriosis, precocious puberty, prostate cancer and other hormone-dependent diseases having a significant effect.

GnRH receptor agonist mediated indirect mechanisms of tumor suppression by long-term effects on the hypothalamic – pituitary – gonadal axis, leading to pituitary gonadotropins (FSH, LH) is reduced, thereby reducing the secretion of sex hormones and indirectly inhibit growth of tumor cells. And a GnRH receptor antagonist directly to inhibit the release of the pituitary gonadotropins, thereby inhibiting tumor cell growth.

Given the limitations of peptide GnRH receptor antagonists, non-peptide GnRH receptor antagonists have been proposed and into the development, clinical trials and launch phase, such as Elagolix (NBI-56418, or also known as ABT-620) is a Abbott and Neurocrine Biosciences Inc company co-developed small molecule GnRH receptor antagonist, is currently in phase III clinical stage, mainly used in the treatment of endometriosis (III phase) and uterine fibroids (II period). June 2012, data released results of a Phase II clinical endometrial endometriosis Houston, the 94th annual meeting of the Endocrine Society: 131 accepts elagolix (150 or 250mg qd), leuprorelin depot (3.75mg sc in, once a month, female patients with endometriosis endometrium 12 weeks) or placebo treatment, elagolix treatment groups in patients with serum hormone estrogen compared to leuprorelin therapy group and the placebo group was significantly reduced. At the same time, elagolix safety and tolerability have been well verified.

Relugolix also known as TAK-385, is a GnRH by the Japanese Takada Pharmaceutical company developed an oral small molecule receptor antagonist, for the treatment of endometriosis, uterine fibroids and prostate. 2011 entered endometriosis and uterine fibroids clinical phase II study, carried out a clinical study of prostate cancer in the same year.

It disclosed a series of current small molecule GnRH receptor antagonists including patent WO2006096785, WO2010026993, WO2011076687, WO2012175514 like.

Despite the large number of interesting studies have been conducted in this field, there remains a need to continue research and development of more effective small molecule GnRH receptor antagonists, the present invention provides a novel GnRH receptor antagonist structure, and found to have such a structure compounds having good activity, reproductive endocrine system effective to treat the disease.

PATENT

US 20120071486, https://patentscope.wipo.int/search/en/detail.jsf?docId=US73518712&redirectedID=true

Example 83

Production of N-(4-(1-(2,6-difluorobenzyl)-5-((dimethylamino)methyl)-3-(6-methoxy-3-pyridazinyl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl)phenyl)-N′-methoxyurea

(MOL) (CDX)

The similar reaction as described in Example 4 by using the compound (100 mg, 0.164 mmol) obtained in Reference Example 54 and methyl iodide (0.010 ml, 0.164 mmol) gave the title compound (17.3 mg, 17%) as colorless crystals.

¹H-NMR (CDCl ₃) δ: 2.15 (6H, s), 3.6-3.8 (2H, m), 3.82 (3H, s), 4.18 (3H, s), 5.35 (2H, s), 6.92 (2H, t, J=8.2 Hz), 7.12 (1H, d, J=8.8 Hz), 7.2-7.65 (7H, m), 7.69 (1H, s).

References

Discovery of TAK-385, a thieno[2,3-d]pyrimidine-2,4-dione derivative, as a potent and orally bioavailable nonpeptide antagonist of gonadotropin releasing hormone (GnRH) receptor
238th ACS Natl Meet (August 16-20, Washington) 2009, Abst MEDI 386

References

^ Jump up to:^a ^b ^c http://adisinsight.springer.com/drugs/800028257
^ Goenka L, George M, Sen M (June 2017). “A peek into the drug development scenario of endometriosis – A systematic review”. Biomed. Pharmacother. 90: 575–585. doi:10.1016/j.biopha.2017.03.092. PMID 28407578.
^ Dellis A, Papatsoris A (October 2017). “Therapeutic outcomes of the LHRH antagonists”. Expert Rev Pharmacoecon Outcomes Res. 17 (5): 481–488. doi:10.1080/14737167.2017.1375855. PMID 28870102.
^ Jump up to:^a ^b ^c Streuli I, de Ziegler D, Borghese B, Santulli P, Batteux F, Chapron C (March 2012). “New treatment strategies and emerging drugs in endometriosis”. Expert Opin Emerg Drugs. doi:10.1517/14728214.2012.668885. PMID 22439891.
^ Elancheran, R.; Maruthanila, V. L.; Ramanathan, M.; Kabilan, S.; Devi, R.; Kunnumakara, A.; Kotoky, Jibon (2015). “Recent discoveries and developments of androgen receptor based therapy for prostate cancer”. Med. Chem. Commun. 6 (5): 746–768. doi:10.1039/C4MD00416G. ISSN 2040-2503.
^ Jump up to:^a ^b ^c ^d ^e ^f Miwa K, Hitaka T, Imada T, Sasaki S, Yoshimatsu M, Kusaka M, Tanaka A, Nakata D, Furuya S, Endo S, Hamamura K, Kitazaki T (July 2011). “Discovery of 1-{4-[1-(2,6-difluorobenzyl)-5-[(dimethylamino)methyl]-3-(6-methoxypyridazin-3-yl)-2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl]phenyl}-3-methoxyurea (TAK-385) as a potent, orally active, non-peptide antagonist of the human gonadotropin-releasing hormone receptor”. J. Med. Chem. 54 (14): 4998–5012. doi:10.1021/jm200216q. PMID 21657270.
^ Jump up to:^a ^b ^c Nakata D, Masaki T, Tanaka A, Yoshimatsu M, Akinaga Y, Asada M, Sasada R, Takeyama M, Miwa K, Watanabe T, Kusaka M (January 2014). “Suppression of the hypothalamic-pituitary-gonadal axis by TAK-385 (relugolix), a novel, investigational, orally active, small molecule gonadotropin-releasing hormone (GnRH) antagonist: studies in human GnRH receptor knock-in mice”. Eur. J. Pharmacol. 723: 167–74. doi:10.1016/j.ejphar.2013.12.001. PMID 24333551.
^ Jump up to:^a ^b MacLean D, Shi H, Suri A, Faessel H, and Saad F (2013). “Safety and Testosterone-Lowering Effects of the Investigational, Oral, GnRH Antagonist, TAK-385 in Healthy Male Volunteers: Results of a Phase 1 Inpatient/Outpatient Study”. doi:10.1210/endo-meetings.2013.CN.1.SAT-318.
^ Struthers RS, Nicholls AJ, Grundy J, Chen T, Jimenez R, Yen SS, Bozigian HP (February 2009). “Suppression of gonadotropins and estradiol in premenopausal women by oral administration of the nonpeptide gonadotropin-releasing hormone antagonist elagolix”. J. Clin. Endocrinol. Metab. 94 (2): 545–51. doi:10.1210/jc.2008-1695. PMC 2646513. PMID 19033369.
^ https://patents.google.com/patent/US7300935/
^ Jump up to:^a ^b https://chem.nlm.nih.gov/chemidplus/rn/737789-87-6

Relugolix
Clinical data


Synonyms	RVT-601; TAK-385
Routes of administration	By mouth
Drug class	GnRH antagonist
Identifiers
IUPAC name [show]
CAS Number	737789-87-6
PubChem CID	10348973
DrugBank	DB11853
ChemSpider	8524431
UNII	P76B05O5V6
KEGG	D10888
ChEMBL	ChEMBL1800159
Chemical and physical data
Formula	C₂₉H₂₇F₂N₇O₅S
Molar mass	623.630 g/mol
3D model (JSmol)	Interactive image
SMILES [hide] CN(C)CC1=C(SC2=C1C(=O)N(C(=O)N2CC3=C(C=CC=C3F)F)C4=NN=C(C=C4)OC)C5=CC=C(C=C5)NC(=O)NOC
InChI [hide] InChI=1S/C29H27F2N7O5S/c1-36(2)14-19-24-26(39)38(22-12-13-23(42-3)34-33-22)29(41)37(15-18-20(30)6-5-7-21(18)31)27(24)44-25(19)16-8-10-17(11-9-16)32-28(40)35-43-4/h5-13H,14-15H2,1-4H3,(H2,32,35,40) Key:AOMXMOCNKJTRQP-UHFFFAOYSA-N

External links

Relugolix – AdisInsight

PHASE	STATUS	PURPOSE	CONDITIONS	COUNT
1	Completed	Basic Science	Healthy Volunteers	1
1	Completed	Treatment	Androgen Deprivation Treatment-naïve Nonmetastatic Prostate Cancer / Hormone Treatment-naïve Participants With Prostate Cancer	1
1	Completed	Treatment	Endometriosis / Prostate Cancer	1
1	Completed	Treatment	Japanese Premenopausal Healthy Adult Women	1
2	Completed	Treatment	Endometriosis	2
2	Completed	Treatment	Prostate Cancer	2
2	Completed	Treatment	Uterine Leiomyomas	1
3	Active Not Recruiting	Treatment	Heavy Menstrual Bleeding / Uterine Leiomyomas	2
3	Active Not Recruiting	Treatment	Uterine Leiomyomas	1
3	Completed	Treatment	Uterine Leiomyomas	1

PHASE	STATUS	PURPOSE	CONDITIONS	COUNT
3	Enrolling by Invitation	Treatment	Endometriosis / Endometriosis related pain	1
3	Enrolling by Invitation	Treatment	Heavy Menstrual Bleeding / Uterine Leiomyomas	1
3	Enrolling by Invitation	Treatment	Uterine Leiomyomas	1
3	Recruiting	Treatment	Endometriosis related pain	2
3	Recruiting	Treatment	Prostate Cancer	1

///////////Relugolix, TAK-385, JAPAN 2019, Relumina, レルゴリクス , PHASE 3

CONC(=O)NC1=CC=C(C=C1)C1=C(CN(C)C)C2=C(S1)N(CC1=C(F)C=CC=C1F)C(=O)N(C2=O)C1=CC=C(OC)N=N1

Filgotinib

August 18, 2015 5:51 am / Leave a comment

Filgotinib

EU APPROVED 2020/9/24, JYSELECA

JAPAN APPROVED2020/9/25

C₂₁H₂₃N₅O₃S
MW425.504
Elemental Analysis: C, 59.28; H, 5.45; N, 16.46; O, 11.28; S, 7.54

1206161-97-8

Cyclopropanecarboxamide, N-[5-[4-[(1,1-dioxido-4-thiomorpholinyl)methyl]phenyl][1,2,4]triazolo[1,5-a]pyridin-2-yl]-

G146034

GLPG0634

N-(5-(4-((1,1-dioxidothiomorpholino)methyl)phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl)cyclopropanecarboxamide

Galapagos Nv INNOVATOR

PHASE 3, Crohn’s disease, Rheumatoid arthritis, Ulcerative colitis

Filgotinib is an orally available inhibitor of JAK1/JAK2 and TYK2 in phase III clinical development at Galapagos and Gilead for the treatment of rheumatoid arthritis, moderate or severe Crohn’s disease and ulcerative colitis

IL-6 antagonist; Jak1 tyrosine kinase inhibitor; Tyk2 tyrosine kinase inhibitor; Jak3 tyrosine kinase inhibitor; Jak2 tyrosine kinase inhibitor

Autoimmune disease; Cancer; Colitis; Crohns disease; Inflammatory disease; Neoplasm; Rheumatoid arthritis; Transplant rejection

In 2017, orphan drug designation was assigned to the compound in the U.S. for the treatment of pediatric Crohn’s disease and pediatric ulcerative colitis.

GlaxoSmithKline had been developing filgotinib preclinically for the treatment of rheumatoid arthritis pursuant to a license; however, in 2010, the compound was re-acquired by Galapagos. In 2012, the product was licensed to Abbott for development and marketing. In January 2013, Abbott spun-off its research-based pharmaceutical business into a newly-formed company AbbVie. The license agreement between Galapagos and Abbott was terminated in September 2015, Galapagos regaining all rights to the product. The same year, Galapagos and Gilead entered into a global partnership and Gilead obtained the global rights of codevelopment and commercialization for the treatment of inflammatory diseases

Filgotinib (GLPG0634), by the Belgian biotech company Galápagos NV, is a drug which is currently under investigation for the treatment of rheumatoid arthritis and Crohn’s disease.

Filgotinib (GLPG0634) is an orally-available, selective inhibitor of JAK1 (Janus kinase 1) for the treatment of rheumatoid arthritis and potentially other inflammatory diseases. Filgotinib (GLPG0634) dose-dependently inhibited Th1 and Th2 differentiation and to a lesser extent the differentiation of Th17 cells in vitro. GLPG0634 was well exposed in rodents upon oral dosing, and exposure levels correlated with repression of Mx2 expression in leukocytes. The JAK1 selective inhibitor GLPG0634 (Filgotinib) is a promising novel therapeutic with potential for oral treatment of rheumatoid arthritis and possibly other immune-inflammatory diseases. Filgotinib (GLPG0634) is currently in a Phase 2 study in Crohn’s disease.

Mechanism of action

Filgotinib is a Janus kinase inhibitor with selectivity for subtype JAK1 of this enzyme. It is considered a promising agent as it inhibits JAK1 selectively. Less selective JAK inhibitors (e.g. tofacitinib) are already being marketed. They show long-term efficacy in the treatment of various inflammatory diseases. However, their lack of selectivity leads to dose-limiting side effects.^[1] It is thought that inhibition of all JAK isoenzymes is beneficial in rheumatoid arthritis. However, pan-JAK inhibition might also lead to unwanted side effects that might not outweigh its benefits. This is the rationale for the development of newer and more selective inhibitors like filgotinib.

The signal transmission of large numbers of proinflammatory cytokines is dependent on JAK1. Inhibition of JAK2 may also contribute to the efficacy against RA. Nonetheless it is thought that JAK2 inhibition might lead to anemia and thrombopenia by interference witherythropoietin and thrombopoietin and granulocyte-macrophage colony-stimulating factor. Therefore one might prefer to choose a more selective JAK1 inhibitor as a primary therapeutic option. Filgotinib exerts a 30-fold selectivity for JAK1 compared to JAK2.^[2] It is however still to be seen to what extent JAK2 inhibition should be avoided.

Novel crystalline forms of filgotinib salts, particularly hydrochloride salt, useful for treating JAK-mediated diseases eg inflammatory diseases, autoimmune diseases, proliferative diseases, allergy and transplant rejection. Galapagos and licensee AbbVie are developing filgotinib, a selective JAK-1 inhibitor, for treating rheumatoid arthritis (RA) and Crohn’s disease (CD). In August 2015, the drug was reported to be in phase 2 clinical development for treating RA and CD. The drug is also being investigated for the treatment of colitis and was discovered as part of the company’s arthritis alliance with GSK; however in August 2010 Galapagos reacquired the full rights. See WO2013189771, claiming use of filgotinib analog for treating inflammatory diseases. Also see WO2010010190 (co-assigned with GSK and Abbott) and WO2010149769 (assigned to Galapagos) claiming filgotinib, generically and specifically, respectively.

Clinical trials and approval

The efficacy of filgotinib is currently studied in a phase2b program (DARWIN trial 1, 2) with involvement of 886 rheumatoid arthritis patients and 180 Crohn’s disease patients.

Phase 1 study

It was shown in phase 1 studies that the pharmacokinetics of filgotinib metabolism is independent of hepatic CYP450 enzymatic degradation. The drug metabolism is however mediated by carboxylesterases. There is no interference reported with the metabolism of methotrexate nor with any of the investigated transport proteins.^[3]

Phase 2 study: Proof of concept (2011)

In november 2011 Galápagos released the results of their phase 2 study (identification: NCT01384422, Eudract: 2010-022953-40) in which 36 patients were treated who showed a suboptimal clinical response to methotrexate treatment. Three groups of twelve patients were treated either with 200 mg filgotinib in a single dose, 200 mg divided in two doses or placebo. The primary end-point was the ACR20 score, which monitors improvements in the symptomatology of the patient. After the scheduled 4 weeks of treatment, 83% of the respondents showed an improved ACR20-score. Half of the treated patients showed a complete (or near complete) remission of the disease. There were no reports ofanemia nor changes in lipidemia. The company stated in their press release that filgotinib is the first selective JAK1 inhibitor that shows clinical efficacy. As a result of this study, the company stated that “GLPG0634 shows one of the highest initial response rates ever reported for rheumatoid arthritis treatments”.^[4]

DARWIN 1 trial

The DARWIN 1 trial is a 24 week double blind placebo-controlled trial with 599 rheumatoid arthritis patients enrolled. All participants have moderate to severe RA and showed an insufficient response to standard methotrexate treatment. The trial compares three dosages of filgotinib as a once or twice per day regimen. During the trial all participants remain on their methotrexate treatment. According to the company, the results of this trial are expected in July 2015.^[5]

DARWIN 2 trial

The DARWIN 2 trial is a double blind placebo-controlled trial with 280 rheumatoid arthritis patients enrolled who show an insufficient response to standard methotrexate treatment. This trial, in contrast to the previous DARWIN 1 trial, methotrexate is discontinued. Therefore, this trial investigates filgotinib as a monotherapy.^[6] The recruitment of DARWIN trial 2b ended in november 2014.^[7] Preliminary results are expected in the second quarter of 2015 and a full completion of the study is expected in the third quarter of 2015.

DARWIN 3 trial

Patients who complete DARWIN 1 and 2 will be eligible for DARWIN 3.

COSY PREDICT

Time line

june 2011: results of first phase 2 trial
november 2014: initiation of DARWIN 1 and 2 trials
april 2015: expected date of DARWIN 1 trial results
june 2015: expected date of DARWIN 2 trial results

NMR FROM NET….ABMOLE, DMSOD6

NMR MEDKOO DMSOD6

CHEMIETEK

GLPG-0634, Current Lot, Certificate of Analysis

GLPG-0634, Current Lot, NMR

GLPG-0634, Current Lot, HPLC-MS

1H NMR PREDICT

13C NMR PREDICT

……………………

MORE PREDICTS

1H NMR PREDICT

13C NMR PREDICT

PRODUCT PATENT

http://www.google.com/patents/WO2010149769A1?cl=en

Applicants:	GALAPAGOS NV [BE/BE]; Generaal De Wittelaan L11/A3 B-2800 Mechelen (BE) (For All Designated States Except US). MENET, Christel Jeanne Marie [FR/BE]; (BE) (For US Only). SMITS, Koen Kurt [BE/BE]; (BE) (For US Only)
Inventors:	MENET, Christel Jeanne Marie; (BE). SMITS, Koen Kurt; (BE)

WO2010149769

International Filing Date:

25.06.2010

ESTIMATED EXP 2030

Condensation of 2-amino-6-bromopyridine (I) with ethoxycarbonyl isothiocyanate (II) in CH2Cl2 gives 1-(6-bromopyridin-2-yl)-3-carboethoxythiourea (III), which upon cyclization with hydroxylamine hydrochloride (IV) in the presence of DIEA in EtOH/MeOH yields 2-amino-5-bromo[1,2,4]triazolo[1,5-a]pyridine (V). N-Acylation of amine (V) with cyclopropanecarbonyl chloride (VI) using Et3N in acetonitrile, and subsequent treatment with methanolic ammonia furnishes the carboxamide (VII) (1-3), which upon Suzuki coupling with 4-(hydroxymethyl)phenylboronic acid (VIII) in the presence of PdCl2(dppf) and K2CO3 in dioxane/H2O at 90 °C, followed by bromination with PBr3 in CHCl3 affords intermediate (IX). Condensation of benzyl bromide derivative (IX) with thiomorpholine-1,1-dioxide (X) using DIEA in CH2Cl2/MeOH yields filgotinib (1,2). Alternatively, condensation of (4-bromomethylphenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (XI) with thiomorpholine 1,1-dioxide (X) in the presence of DIEA in CH2Cl2/MeOH gives intermediate (XII), which undergoes Suzuki coupling with aryl bromide (VII) in the presence of PdCl2(dppf) and K2CO3 in dioxane/H2O at 90 °C to afford the target filgotinib

The present invention is based on the discovery that the compound of the invention is able to act as an inhibitor of JAK and that it is useful for the treatment of inflammatory conditions, autoimmune diseases, proliferative diseases, transplantation rejection, diseases involving impairment of cartilage turnover, congenital cartilage malformations, and/or diseases associated with hypersecretion of IL6. In a specific aspect the compound is an inhibitor of JAKl and JAK2. The present invention also provides methods for the production of this compound, a pharmaceutical composition comprising this compound and methods for treating inflammatory conditions, autoimmune diseases, proliferative diseases, transplantation rejection, diseases involving impairment of cartilage turnover, congenital cartilage malformations, and/or diseases associated with hypersecretion of IL6 by administering the compound of the invention.

Accordingly, in a first aspect of the invention, a compound of the invention is provided having a formula (I):

[0017] The compound of the invention is a novel inhibitor of JAK that appears to exhibit a dramatically improved in vivo potency as compared to structurally similar compounds. In a particular embodiment the compound of the invention is an inhibitor of JAKl and JAK2. In particular it appears to exhibit this increase in potency at lower in vivo exposure levels compared to structurally similar compounds. The use of a compound with these improvements is expected to result in a lower dosage requirement (and therefore an improved dosing schedule).

General Synthetic Method Scheme 1

1. RCOCI, Et₃N 2. NH₃ / MeOH CH₃CN, 20 ⁰C 2O ⁰C

wherein Ar represents phenyl-Ll-heterocycloalkyl, where Ll is a bond, -CH₂– or -CO- and the heterocycloalkyl group is optionally substituted.

General

1.1.1 l-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2)

(2)

[00117] To a solution of 2-amino-6-bromopyridine (1) (253.8 g, 1.467 mol) in DCM (2.5 L) cooled to 5 ⁰C is added ethoxycarbonyl isothiocyanate (173.0 mL, 1.467 mol) dropwise over 15 min. The reaction mixture is then allowed to warm to room temp. (20 ⁰C) and stirred for 16 h. Evaporation in vacuo gives a solid which may be collected by filtration, thoroughly washed with petrol (3×600 mL) and air-dried to afford (2). The thiourea may be used as such for the next step without any purification. ¹H (400 MHz, CDCl₃) δ 12.03 (IH, br s, NH), 8.81 (IH, d, J 7.8 Hz, H-3), 8.15 (IH, br s, NH), 7.60 (IH, t, J 8.0 Hz, H-4), 7.32 (IH, dd, J 7.7 and 0.6 Hz, H-5), 4.31 (2H, q, J 7.1 Hz, CH₂), 1.35 (3H, t, J 7.1 Hz, CH₃).

7.7.2 5-Bromo-[l, 2, 4]triazolo[l, 5-a]pyridin-2-ylamine (3)

[00118] To a suspension of hydroxylamine hydrochloride (101.8 g, 1.465 mol) in EtOH/MeOH

(1 :1, 900 mL) is added N,N-diisopropylethylamine (145.3 mL, 0.879 mol) and the mixture is stirred at room temp. (20 ⁰C) for 1 h. l-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2) (89.0 g, 0.293 mol) is then added and the mixture slowly heated to reflux (Note: bleach scrubber is required to quench H₂S evolved). After 3 h at reflux, the mixture is allowed to cool and filtered to collect the precipitated solid. Further product is collected by evaporation in vacuo of the filtrate, addition Of H₂O (250 mL) and filtration. The combined solids are washed successively with H₂O (250 mL), EtOH/MeOH (1 : 1, 250 mL) and Et₂O (250 mL) then dried in vacuo to afford the triazolopyridine derivative (3) as a solid. The compound may be used as such for the next step without any purification. ¹H (400 MHz, DMSO-t/β) δ 7.43-7.34 (2H, m, 2 x aromatic-H), 7.24 (IH, dd, J 6.8 and 1.8 Hz, aromatic-H), 6.30 (2H, br, NH₂); m/z 213/215 (1 :1, M+H⁺, 100%).

7.7.3 General procedure for mono-acylation to afford intermediate (4):

[00119] To a solution of the 2-amino-triazolopyridine (3) (7.10 g, 33.3 mmol) in dry CH₃CN

(150 mL) at 5 ⁰C is added Et₃N (11.6 mL, 83.3 mmol) followed by cyclopropanecarbonyl chloride (83.3 mmol). The reaction mixture is then allowed to warm to ambient temperature and stirred until all starting material (3) is consumed. If required, further Et₃N (4.64 mL, 33.3 mmol) and cyclopropanecarbonyl chloride (33.3 mmol) is added to ensure complete reaction. Following solvent evaporation in vacuo the resultant residue is treated with 7 N methanolic ammonia solution (50 mL) and stirred at ambient temp, (for 1-16 h) to hydro lyse any bis-acylated product. Product isolation is made by removal of volatiles in vacuo followed by trituration with Et₂O (50 mL). The solids are collected by filtration, washed with H₂O (2x50mL), acetone (50 mL) and Et₂O (50 mL), then dried in vacuo to give the required bromo intermediate (4).

Method A

Preparation of compounds of the invention via Suzuki coupling (5):

[00120] An appropriate boronic acid (2eq.) is added to a solution of bromo intermediate (4) in

1 ,4-dioxane/water (5:1). K₂CO3 (2 eq.) and PdCl₂dppf (5%) are added to the solution. The resulting mixture is then heated in a microwave at 140 ⁰C for 30 min (this reaction can also be carried out by traditional heating in an oil bath at 90⁰C for 16h under N₂). Water is added and the solution is extracted with ethyl acetate. The organic layers are dried over anhyd. MgSθ₄ and evaporated in vacuo. The final compound is obtained after purification by flash chromatography or preparative HPLC. HPLC: Waters

XBridge Prep Cl 8 5μm ODB 19mm ID x 100mm L (Part No.186002978). All the methods are using

MeCN/H₂O gradients. H₂O contains either 0.1% TFA or 0.1% NH₃.

Method B

Bl. 4 4-[2-(Cyclopropanecarbonyl-amino)-[ 1 , 2, 4]triazolo[l, 5-a] pyridin-5-yl] -benzoyl chloride

[00121] 2 Drops of DMF are added to a solution of 4-[2-(cyclopropanecarbonyl-amino)- [l,2,4]triazolo[l,5-a]pyridin-5-yl]-benzoic acid (1 eq) obtained by Method A using 4-carboxyphenylboronic acid in DCM under N₂ atmosphere. Then oxalyl chloride (2 eq) is added dropwise to this resulting solution (gas release). The mixture is stirred at room temperature for 2 hours. After completion of the reaction by LCMS, the solvent is removed. The crude acid chloride is used without further purification in next step.

B2. Amide formation (General Method)

[00122] An appropriate amine (1.1 eq) and Et₃N (5 eq) are dissolved in DCM under N₂ atmosphere and cooled at 0⁰C. The acid chloride (Bl, 1 eq) dissolved in DCM is added dropwise to this solution. The reaction is stirred at room temperature for 16 h. After this time, reaction is complete. The compound is extracted with EtOAc and water, washed with brine and dried over anhyd. MgSO₄. Organic layers are filtered and evaporated. The final compound is isolated by preparative HPLC. Preparative HPLC: Waters XBridge Prep C18 5μm ODB 19mm ID x 100mm L (Part No.186002978). All the methods are using MeCN/H₂O gradients. H₂O contains either 0.1% TFA or 0.1% NH₃.

Method C

Wherein R^3a or R^3b together with the nitrogen atom to which they are attached, may form a heterocycloalkyl.

Reductive alkylation (general method)

[00123] An appropriate amine (2 eq.), cyclopropanecarboxylic acid (for example cyclopropanecarboxylic acid [5-(4-formyl-phenyl)-[l,2,4]triazolo[l,5-a]pyridine-2-yl]-amide) prepared by method A (1 eq.) and Ti(OPr)₄ are mixed and stirred at room temperature for 3 hrs. The mixture is diluted in ethanol and Na(CN)BH₃ (leq.) is added. The resulting solution is stirred at room temperature for 16 hrs. The mixture is diluted in water and filtered. The filtrate is washed with ethanol. The combined solvent phases are evaporated under vacuum. The final compound is isolated by preparative HPLC.

Method D
wherein R¹ and R² together with the Nitrogen atom to which they are attached, may form a heterocycloalkyl.

Reaction ofalkylation

[00124] 2-(4-Bromomethyl-phenyl)-4,4,5,5-tetramethyl-[l,3,2]dioxaborolane (leq) and Et₃N (2 eq) (or AgCO₃) are dissolved in DCM/MeOH (4:1 v:v) under N₂ and an amine (2 eq) is added dropwise. The resulting solution is stirred at room temperature for 16h. After this time, the reaction is complete. The solvent is evaporated. The compound is extracted with EtOAc and water, washed with brine and dried over anhyd. MgSθ₄. Organic layers are filtered and evaporated. The final compound is isolated by flash chromatography.

Suzuki coupling

[00125] The obtained boronic acid (2eq.) is added to a solution of cyclopropanecarboxylic acid

(5-bromo-[l,2,4]triazolo[l,5-a]pyridin-2-yl)-amide (4) in 1 ,4-dioxane/water (5:1). K₂CO₃ (2 eq.) and PdCl₂dppf (5%) are added to the solution. The resulting mixture is then heated in a microwave at 140 ⁰C for 30 min (This reaction can also be carried out by traditional heating in an oil bath at 90⁰C for 16h under N₂). Water is added and the solution is extracted with ethyl acetate. The organic layers are dried over anhyd. MgSθ₄ and evaporated in vacuo. The final compound is obtained after purification by flash chromatography or preparative HPLC. HPLC: Waters XBridge Prep C18 5μm ODB 19mm ID x 100mm L (Part No.186002978). All the methods are using MeCN/H₂O gradients. H₂O contains either 0.1% TFA or 0.1% NH₃.

Synthesis of the compound of the invention and comparative examples

Compound l(the compound of the invention)

Step 1:

[00126] 2-(4-Bromomethyl-phenyl)-4,4,5,5-tetramethyl-[l,3,2]dioxaborolane (leq) and DIPEA

(2 eq) were dissolved in DCM/MeOH (5:1 v:v) under N₂ and thiomorpholine 1,1 -dioxide (2 eq) was added portionwise. The resulting solution was stirred at room temperature for 16h. After this time, the reaction was complete. The solvent was evaporated. The compound was extracted with EtOAc and water, washed with brine and dried over anhyd. MgS O₄. Organic layers were filtered and evaporated. The final compound was isolated without further purification.

Step 2: Suzuki coupling

[00127] 4-[4-(4,4,5,5-Tetramethyl-[l,3,2]dioxaborolan-2-yl)-benzyl]-thiomorpholine-l,l-dioxide

(l.leq.) was added to a solution of cyclopropanecarboxylic acid (5-bromo-[l,2,4]triazolo[l,5-a]pyridin-2-yl)-amide in 1 ,4-dioxane/water (4:1). K₂CO₃ (2 eq.) and PdCl₂dppf (0.03 eq.) were added to the solution. The resulting mixture was then heated in an oil bath at 90⁰C for 16h under N₂. Water was added and the solution was extracted with ethyl acetate. The organic layers were dried over anhyd. MgSθ₄ and evaporated in vacuo. The final compound was obtained after purification by flash chromatography.

[00128] Alternatively, after completion of the reaction, a palladium scavenger such as 1,2-bis(diphenylphosphino)ethane, is added, the reaction mixture is allowed to cooled down and a filtration is performed. The filter cake is reslurried in a suitable solvent (e.g. acetone), the solid is separated by filtration, washed with more acetone, and dried. The resulting solid is resuspended in water, aqueous HCl is added, and after stirring at RT, the resulting solution is filtered on celite (Celpure P300). Aqueous NaOH is then added to the filtrate, and the resulting suspension is stirred at RT, the solid is separated by filtration, washed with water and dried by suction. Finally the cake is re-solubilised in a mixture of THF/H₂O, treated with a palladium scavenger (e.g. SMOPEX 234) at 50⁰C, the suspension is filtered, the organic solvents are removed by evaporation, and the resulting slurry is washed with water and methanol, dried and sieved, to obtain the title compound as a free base.

Alternative route to Compound l(the compound of the invention):

Step 1:

[00129] 4-(Hydroxymethyl)phenylboronic acid (l.leq.) was added to a s o luti o n o f cyclopropanecarboxylic acid (5-bromo-[l,2,4]triazolo[l,5-a]pyridin-2-yl)-amide in 1 ,4-dioxane/water (4:1). K₂CO₃ (2 eq.) and PdCl₂dppf (0.03 eq.) were added to the solution. The resulting mixture was then heated in an oil bath at 90⁰C for 16h under N₂. Water was added and the solution was extracted with ethyl acetate. The organic layers were dried over anhyd. MgSθ₄ and evaporated in vacuo. The resulting mixture was used without further purification.

Step 2:

[00130] To a solution of cyclopropanecarboxylic acid [5-(4-hydroxymethyl-phenyl)- [l,2,4]triazolo[l,5-a]pyridin-2-yl]-amide (1.0 eq) in chloroform was slowly added phosphorus tribromide (1.0 equiv.). The reaction mixture was stirred at room temperature for 20 hours, quenched with ice and water (20 mL) and extracted with dichloromethane. The organic layer was dried over anhyd. MgSθ₄, filtered and concentrated to dryness. The resulting white residue was triturated in dichloromethane/diethyl ether 2:1 to afford the expected product as a white solid.

Step 3:

[00131] Cyclopropanecarboxylic acid [5-(4-bromomethyl-phenyl)-[l,2,4]triazolo[l,5-a]pyridin- 2-yl]-amide (leq) and DIPEA (2 eq) were dissolved in DCM/MeOH (5:1 v:v) under N₂ and thiomorpholine 1,1 -dioxide (1.1 eq) was added dropwise. The resulting solution was stirred at room temperature for 16h. After this time, the reaction was complete. The solvent was evaporated. The compound was dissolved in DCM, washed with water and dried over anhyd. MgSO^ Organic layers were filtered and evaporated. The final compound was isolated by column chromatography using EtOAc to afford the desired product.

PATENT

WO 2010010190

WO 2013173506

WO 2013189771

WO 2015117980

WO 2015117981

POLYMORPH

CN 105061420

CN105061420

https://encrypted.google.com/patents/CN105061420A?cl=en

JAK inhibitor N-(5-(4-(1,1-dioxothiomorpholinyl)methyl)phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl)cyclopropanecarboxamide, and methods for preparing the four crystal forms, wherein the four crystal forms respectively are a crystal form H1, a crystal form H2, a crystal form H3 and a crystal form H4,

POLYMORPH

E CRYSTAL

CN 105111206

D CRYSTAL

CN 105111207

H CRYSYAL

CN 105198876

CN 105198877

F CN 105198878

C CN 105198880

POLYMORPH

WO 2016105453

POLYMORPH

Preparation of solid forms of filgotinib free base

WO 2017012773

The present invention relates to cryst. filgotinib free base (I), a method of its prepn. and a pharmaceutical compn. comprising the same. Thus, reacting the compd. II with thiomorpholine dioxide afforded 92% I (purity of 98.6%) which was then converted into its hydrochloride salt. Pharmaceutical compn. comprising compd. I was disclosed.

POLYMORPH

CN 105669669

The present invention provides a crystal form A, B, D, G and M of N-[5-[4-[(1,1-dioxido-4-thiomorpholinyl)methyl]phenyl][1,2,4]triazolo[1,5-a]pyridin-2-yl]cyclopropanecarboxamide hydrochloride.

PAPER

Future Medicinal Chemistry (2015), 7(2), 203-235. | Language: English, Database: CAPLUSA review. The discovery of the JAK-STAT pathway was a landmark in cell biol. The identification of these pathways has changed the landscape of treatment of rheumatoid arthritis and other autoimmune diseases. The two first (unselective) JAK inhibitors have recently been approved by the US FDA for the treatment of myelofibrosis and rheumatoid arthritis and many other JAK inhibitors are currently in clin. development or at the discovery stage. Research groups have demonstrated the different roles of JAK member and the therapeutic potential of targeting them selectively. ………..

https://www.future-science.com/doi/10.4155/fmc.14.149

PAPER

Journal of Pharmaceutical Sciences (Philadelphia, PA, United States) (2018), 107(6), 1624-1632.

PATENT

US2010/331319 A1, ; Page/Page column 13-14

http://www.google.com/patents/US20100331319

Synthetic Preparation of the Compound of the Invention and Comparative Examples

The compound of the invention and the comparative examples can be produced according to the following scheme.

wherein Ar represents phenyl-L1-heterocycloalkyl, where L1 is a bond, —CH₂— or —CO— and the heterocycloalkyl group is optionally substituted.

General 1.1.1 1-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2)

To a solution of 2-amino-6-bromopyridine (1) (253.8 g, 1.467 mol) in DCM (2.5 L) cooled to 5° C. is added ethoxycarbonyl isothiocyanate (173.0 mL, 1.467 mol) dropwise over 15 min. The reaction mixture is then allowed to warm to room temp. (20° C.) and stirred for 16 h. Evaporation in vacuo gives a solid which may be collected by filtration, thoroughly washed with petrol (3×600 mL) and air-dried to afford (2). The thiourea may be used as such for the next step without any purification. ¹H (400 MHz, CDCl₃) δ 12.03 (1H, br s, NH), 8.81 (1H, d, J=7.8 Hz, H-3), 8.15 (1H, br s, NH), 7.60 (1H, t, J=8.0 Hz, H-4), 7.32 (1H, dd, J 7.7 and 0.6 Hz, H-5), 4.31 (2H, q, J 7.1 Hz, CH₂), 1.35 (3H, t, J 7.1 Hz, CH₃).

1.1.2 5-Bromo-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine (3)

To a suspension of hydroxylamine hydrochloride (101.8 g, 1.465 mol) in EtOH/MeOH (1:1, 900 mL) is added N,N-diisopropylethylamine (145.3 mL, 0.879 mol) and the mixture is stirred at room temp. (20° C.) for 1 h. 1-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2) (89.0 g, 0.293 mol) is then added and the mixture slowly heated to reflux (Note: bleach scrubber is required to quench H₂S evolved). After 3 h at reflux, the mixture is allowed to cool and filtered to collect the precipitated solid. Further product is collected by evaporation in vacuo of the filtrate, addition of H₂O (250 mL) and filtration. The combined solids are washed successively with H₂O (250 mL), EtOH/MeOH (1:1, 250 mL) and Et₂O (250 mL) then dried in vacuo to afford the triazolopyridine derivative (3) as a solid. The compound may be used as such for the next step without any purification. ¹H (400 MHz, DMSO-d₆) δ 7.43-7.34 (2H, m, 2×aromatic-H), 7.24 (1H, dd, J 6.8 and 1.8 Hz, aromatic-H), 6.30 (2H, br, NH₂); m/z 213/215 (1:1, M+H⁺, 100%).

1.1.3 General Procedure for Mono-Acylation to Afford Intermediate (4)

To a solution of the 2-amino-triazolopyridine (3) (7.10 g, 33.3 mmol) in dry CH₃CN (150 mL) at 5° C. is added Et₃N (11.6 mL, 83.3 mmol) followed by cyclopropanecarbonyl chloride (83.3 mmol). The reaction mixture is then allowed to warm to ambient temperature and stirred until all starting material (3) is consumed. If required, further Et₃N (4.64 mL, 33.3 mmol) and cyclopropanecarbonyl chloride (33.3 mmol) is added to ensure complete reaction. Following solvent evaporation in vacuo the resultant residue is treated with 7 N methanolic ammonia solution (50 mL) and stirred at ambient temp. (for 1-16 h) to hydrolyse any bis-acylated product. Product isolation is made by removal of volatiles in vacuo followed by trituration with Et₂O (50 mL). The solids are collected by filtration, washed with H₂O (2×50 mL), acetone (50 mL) and Et₂O (50 mL), then dried in vacuo to give the required bromo intermediate (4).

Method A Preparation of Compounds of the Invention Via Suzuki Coupling (5):

An appropriate boronic acid (2 eq.) is added to a solution of bromo intermediate (4) in 1,4-dioxane/water (5:1). K₂CO₃(2 eq.) and PdCl₂dppf (5%) are added to the solution. The resulting mixture is then heated in a microwave at 140° C. for 30 min (this reaction can also be carried out by traditional heating in an oil bath at 90° C. for 16 h under N₂). Water is added and the solution is extracted with ethyl acetate. The organic layers are dried over anhyd. MgSO₄and evaporated in vacuo. The final compound is obtained after purification by flash chromatography or preparative HPLC. HPLC: Waters XBridge Prep C18 5 μm ODB 19 mm ID×100 mm L (Part No. 186002978). All the methods are using MeCN/H₂O gradients. H₂O contains either 0.1% TFA or 0.1% NH₃.

Method B

B1. 4 4-[2-(Cyclopropanecarbonyl-amino)-[1,2,4]triazolo[1,5-a]pyridin-5-yl]-benzoyl chloride

2 Drops of DMF are added to a solution of 4-[2-(cyclopropanecarbonyl-amino)-[1,2,4]triazolo[1,5-a]pyridin-5-yl]-benzoic acid (1 eq) obtained by Method A using 4-carboxyphenylboronic acid in DCM under N₂atmosphere. Then oxalyl chloride (2 eq) is added dropwise to this resulting solution (gas release). The mixture is stirred at room temperature for 2 hours. After completion of the reaction by LCMS, the solvent is removed. The crude acid chloride is used without further purification in next step.

B2. Amide Formation (General Method)

An appropriate amine (1.1 eq) and Et₃N (5 eq) are dissolved in DCM under N₂atmosphere and cooled at 0° C. The acid chloride (B1, 1 eq) dissolved in DCM is added dropwise to this solution. The reaction is stirred at room temperature for 16 h. After this time, reaction is complete. The compound is extracted with EtOAc and water, washed with brine and dried over anhyd. MgSO₄. Organic layers are filtered and evaporated. The final compound is isolated by preparative HPLC. Preparative HPLC: Waters XBridge Prep C18 5 μm ODB 19 mm ID×100 mm L (Part No. 186002978). All the methods are using MeCN/H₂O gradients. H₂O contains either 0.1% TFA or 0.1% NH₃.

…

Synthesis of the Compound of the Invention and Comparative Examples Compound 1 (the Compound of the Invention) Step 1:

2-(4-Bromomethyl-phenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (1 eq) and DIPEA (2 eq) were dissolved in DCM/MeOH (5:1 v:v) under N₂and thiomorpholine 1,1-dioxide (2 eq) was added portionwise. The resulting solution was stirred at room temperature for 16 h. After this time, the reaction was complete. The solvent was evaporated. The compound was extracted with EtOAc and water, washed with brine and dried over anhyd. MgSO₄. Organic layers were filtered and evaporated. The final compound was isolated without further purification.

STEP 2: Suzuki coupling

4-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzyl]-thiomorpholine-1,1-dioxide (1.1 eq.) was added to a solution of cyclopropanecarboxylic acid (5-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-amide in 1,4-dioxane/water (4:1). K₂CO₃(2 eq.) and PdCl₂dppf (0.03 eq.) were added to the solution. The resulting mixture was then heated in an oil bath at 90° C. for 16 h under N₂. Water was added and the solution was extracted with ethyl acetate. The organic layers were dried over anhyd. MgSO₄and evaporated in vacuo. The final compound was obtained after purification by flash chromatography.

Alternatively, after completion of the reaction, a palladium scavenger such as 1,2-bis(diphenylphosphino)ethane, is added, the reaction mixture is allowed to cooled down and a filtration is performed. The filter cake is reslurried in a suitable solvent (e.g. acetone), the solid is separated by filtration, washed with more acetone, and dried. The resulting solid is resuspended in water, aqueous HCl is added, and after stirring at RT, the resulting solution is filtered on celite (Celpure P300). Aqueous NaOH is then added to the filtrate, and the resulting suspension is stirred at RT, the solid is separated by filtration, washed with water and dried by suction. Finally the cake is re-solubilised in a mixture of THF/H₂O, treated with a palladium scavenger (e.g. SMOPEX 234) at 50° C., the suspension is filtered, the organic solvents are removed by evaporation, and the resulting slurry is washed with water and methanol, dried and sieved, to obtain the title compound as a free base.

Alternative Route to Compound 1 (the Compound of the Invention): Step 1:

4-(Hydroxymethyl)phenylboronic acid (1.1 eq.) was added to a solution of cyclopropanecarboxylic acid (5-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-amide in 1,4-dioxane/water (4:1). K₂CO₃(2 eq.) and PdCl₂dppf (0.03 eq.) were added to the solution. The resulting mixture was then heated in an oil bath at 90° C. for 16 h under N₂. Water was added and the solution was extracted with ethyl acetate. The organic layers were dried over anhyd. MgSO₄and evaporated in vacuo. The resulting mixture was used without further purification.

Step 2:

To a solution of cyclopropanecarboxylic acid [5-(4-hydroxymethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amide (1.0 eq) in chloroform was slowly added phosphorus tribromide (1.0 equiv.). The reaction mixture was stirred at room temperature for 20 hours, quenched with ice and water (20 mL) and extracted with dichloromethane. The organic layer was dried over anhyd. MgSO₄, filtered and concentrated to dryness. The resulting white residue was triturated in dichloromethane/diethyl ether 2:1 to afford the expected product as a white solid.

Step 3:

Cyclopropanecarboxylic acid [5-(4-bromomethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amide (1 eq) and DIPEA (2 eq) were dissolved in DCM/MeOH (5:1 v:v) under N₂and thiomorpholine 1,1-dioxide (1.1 eq) was added dropwise. The resulting solution was stirred at room temperature for 16 h. After this time, the reaction was complete. The solvent was evaporated. The compound was dissolved in DCM, washed with water and dried over anhyd. MgSO₄. Organic layers were filtered and evaporated. The final compound was isolated by column chromatography using EtOAc to afford the desired product.

…………………….

PATENT

WO 2015117981

Novel salts and pharmaceutical compositions thereof for the treatment of inflammatory disorders

Also claims a method for preparing filgotinib hydrochloride trihydrate. The present filing forms a pair with this week’s filing, WO2015117980, claiming a tablet composition comprising filgotinib hydrochloride.

The compound cyclopropanecarboxylic acid {5-[4-(l,l-dioxo-thiomorpholin-4-ylmethyl)-phenyl]-[l,2,4]triazolo[l,5-a]pyridin-2-yl -amide (Compound 1), which has the chemical structure:

is disclosed in our earlier application WO 2010/149769 (Menet C. J., 2010) as being an inhibitor of JAK and as being useful in the treatment of inflammatory conditions, autoimmune diseases, proliferative diseases, allergy, transplant rejection, diseases involving impairment of cartilage turnover, congenital cartilage malformations, and/or diseases associated with hypersecretion of IL6 or interferons. Hereafter this compound is named Compound 1. The data presented in WO 2010/149769 demonstrate that despite similar in vitro activities, Compound 1 has unexpectedly high in vivo potency compared with structurally similar compounds.

Example 1. Preparation of Compound 1

1.1. Route 1

1.1.1. 4-[4-(4,4,5,5-Tetramethyl-[l,3,2]dioxaborolan-2-yl)-benzyl]-thiomorpholine-l,l-dioxide

[00205] 2-(4-Bromomethyl-phenyl)-4,4,5,5-tetramethyl-[l,3,2]dioxaborolane (1 eq) and DIPEA (2 eq) are dissolved in DCM/MeOH (5:1 v:v) under N₂ and thiomorpholine 1,1 -dioxide (2 eq) is added portionwise. The resulting solution is stirred at room temperature for 16h. After this time, the reaction is complete. The solvent is evaporated. The compound is extracted with EtOAc and water, washed with brine and dried over anhydrous MgSO i. Organic layers are filtered and evaporated. The final compound is isolated without further purification.

1.1.2. Cyclopropanecarboxylic acid (5-bromo-[l,2,4]triazolo[l,5-a]pyridin-2-yl)-amide

1.1.2.1. Step i): l-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea

[00206] To a solution of 2-amino-6-bromopyridine (1) (253.8 g, 1.467 mol) in DCM (2.5 L) cooled to 5°C is added ethoxycarbonyl isothiocyanate (173.0 mL, 1.467 mol) dropwise over 15 min. The reaction

mixture is then allowed to warm to room temp. (20 °C) and stirred for 16 h. Evaporation in vacuo gives a solid which may be collected by filtration, thoroughly washed with petrol (3 x 600 niL) and air-dried to afford the desired product. The thiourea may be used as such for the next step without any purification. ^lH (400 MHz, CDC1₃) δ 12.03 (1H, br s), 8.81 (1H, d), 8.15 (1H, br s), 7.60 (1H, t), 7.32 (1H, dd), 4.31 (2H, q), 1.35 (3H, t).

1.1.2.2. Step ii): 5-Bromo-[l,2,4]triazolo[l,5-a]pyridin-2-ylamine

[00207] To a suspension of hydroxylamine hydrochloride (101.8 g, 1.465 mol) in EtOH/MeOH (1 : 1, 900 mL) is added NN-diisopropylethylamine (145.3 mL, 0.879 mol) and the mixture is stirred at room temp. (20 °C) for 1 h. l-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2) (89.0 g, 0.293 mol) is then added and the mixture slowly heated to reflux (Note: bleach scrubber is required to quench H₂S evolved). After 3h at reflux, the mixture is allowed to cool and filtered to collect the precipitated solid. Further product is collected by evaporation in vacuo of the filtrate, addition of H₂0 (250 mL) and filtration. The combined solids are washed successively with H₂0 (250 mL), EtOH/MeOH (1 : 1, 250 mL) and Et₂0 (250 mL) then dried in vacuo to afford the triazolopyridine derivative (3) as a solid. The compound may be used as such for the next step without any purification. ^lH (400 MHz, DMSO-i¼) δ 7.43-7.34 (2H, m, 2 x aromatic-H), 7.24 (1H, dd, J 6.8 and 1.8 Hz, aromatic-H), 6.30 (2H, br, NH₂); m/z 213/215 (1 : 1, M+H⁺, 100%).

1.1.2.3. Step Hi): Cyclopropanecarboxylic acid (5-bromo-[l ,2,4]triazolo[l ,5-a]pyridin-2-yl)-amide

[00208] To a solution of the 2-amino-triazolopyridine obtained in the previous step (7.10 g, 33.3 mmol) in dry MeCN (150 mL) at 5°C is added Et₃N (11.6 mL, 83.3 mmol) followed by cyclopropanecarbonyl chloride (83.3 mmol). The reaction mixture is then allowed to warm to ambient temperature and stirred until all starting material is consumed. If required, further Et₃N (4.64 mL, 33.3 mmol) and cyclopropanecarbonyl chloride (33.3 mmol) is added to ensure complete reaction. Following solvent evaporation in vacuo the resultant residue is treated with 7 N methanolic ammonia solution (50 mL) and stirred at ambient temp, (for 1-16 h) to hydro lyse any bis-acylated product. Product isolation is made by removal of volatiles in vacuo followed by trituration with Et₂0 (50 mL). The solids are collected by filtration, washed with H₂0 (2x50mL), acetone (50 mL) and Et₂0 (50 mL), then dried in vacuo to give the desired compound.

1.1.3. Compound 1

[00209] 4-[4-(4,4,5,5-Tetramethyl-[l ,3,2]dioxaborolan-2-yl)-benzyl] hiomoφholine , l -dioxide (l . l eq.) is added to a solution of cyclopropanecarboxylic acid (5-bromo-[l ,2,4]triazolo[l ,5-a]pyridin-2-yl)-amide in 1 ,4-dioxane/water (4: 1). K₂CO₃ (2 eq.) and PdC^dppf (0.03 eq.) are added to the solution. The resulting mixture is then heated in an oil bath at 90°C for 16h under N₂. Water is added and the solution is extracted with ethyl acetate. The organic layers are dried over anhydrous MgS0₄ and evaporated in vacuo.

[00210] The final compound is obtained after purification by flash chromatography.

[00211] Alternatively, after completion of the reaction, a palladium scavenger such as 1 ,2-bis(diphenylphosphino)ethane, is added, the reaction mixture is allowed to cool down and a filtration is performed. The filter cake is reslurried in a suitable solvent (e.g. acetone), the solid is separated by filtration, washed with more acetone, and dried. The resulting solid is resuspended in water, aqueous HC1 is added, and after stirring at room temperature, the resulting solution is filtered on celite (Celpure P300). Aqueous NaOH is then added to the filtrate, and the resulting suspension is stirred at room temperature, the solid is separated by filtration, washed with water and dried by suction. Finally the cake is re-solubilised in a mixture of THF/H₂0, treated with a palladium scavenger (e.g. SMOPEX 234) at 50°C, the suspension is filtered, the organic solvents are removed by evaporation, and the resulting slurry is washed with water and methanol, dried and sieved, to obtain the desired compound as a free base.

1.2. Route 2

1.2.1. Step 1: cyclopropanecarboxylic acid [5-(4-hydroxymethyl-phenyl)-[l,2, 4]triazolo[l, 5- a] pyridin-2-yl] -amide

[00212] 4-(Hydroxymethyl)phenylboronic acid (l . l eq.) is added to a solution of cyclopropanecarboxylic acid (5-bromo-[l ,2,4]triazolo[l ,5-a]pyridin-2-yl)-amide in 1 ,4-dioxane/water

(4:1). K2CO3 (2 eq.) and PdC^dppf (0.03 eq.) are added to the solution. The resulting mixture is then heated in an oil bath at 90°C for 16h under N₂. Water is added and the solution is extracted with ethyl acetate. The organic layers are dried over anhydrous MgS0₄ and evaporated in vacuo. The resulting mixture is used without further purification.

1.2.2. Step 2: Cyclopropanecarboxylic acid [5-(4-bromomethyl-phenyl)-[l,2,4]triazolo[l,5- a Jpyridin-2-ylJ -amide

[00213] To a solution of cyclopropanecarboxylic acid [5-(4-hydroxymethyl-phenyl)-[l,2,4]triazolo[l,5-a]pyridin-2-yl] -amide (1.0 eq) in chloroform is slowly added phosphorus tribromide (1.0 eq.). The reaction mixture is stirred at room temperature for 20 h, quenched with ice and water (20 mL) and extracted with dichloromethane. The organic layer is dried over anhydrous MgSO i, filtered and concentrated to dryness. The resulting white residue is triturated in dichloromethane/diethyl ether 2:1 to afford the desired product.

1.2.3. Step 3:

[00214] Cyclopropanecarboxylic acid [5-(4-bromomethyl-phenyl)-[l,2,4]triazolo[l,5-a]pyridin-2-yl]-amide (l eq) and DIPEA (2 eq) are dissolved in DCM/MeOH (5: 1 v:v) under N₂ and thiomorpho line 1,1-dioxide (1.1 eq) is added dropwise. The resulting solution is stirred at room temperature for 16h. After this time, the reaction is complete. The solvent is evaporated. The compound is dissolved in DCM, washed with water and dried over anhydrous MgSO i. Organic layers are filtered and evaporated. The final compound is isolated by column chromatography using EtOAc to afford the desired product.

…………………

PATENT

http://www.google.co.in/patents/WO2013189771A1?cl=en

Example 1. Synthesis of the compounds

1.1. Route 1

1.1.1. Synthesis of 5-Bromo-[l,2,4]triazolo[l,5-a]pyridin-2-ylamine (Intermediate 3)

led to 5 °C was added ethoxycarbonyl isothiocyanate (173.0 mL, 1.467 mol) dropwise over 15 min. The reaction mixture was then allowed to warm to room temp. (20 °C) and stirred for 16 h. Evaporation in vacuo gave a solid which was collected by filtration, thoroughly washed with petrol (3×600 mL) and air-dried to afford (2). The thiourea was used as such in the next step without any purification.

[00157] ^lH (400 MHz, CDC1₃) δ 12.03 (IH, br s, NH), 8.81 (IH, d, J 7.8 Hz, H-3), 8.15 (IH, br s, NH), 7.60 (IH, t, J 8.0 Hz, H-4), 7.32 (IH, dd, J 7.7 and 0.6 Hz, H-5), 4.31 (2H, q, J 7.1 Hz, CH₂), 1.35 (3H, t, J 7.1 Hz, CH₃).

1.1.1.2. 5-Bromo-f 1,2, 4]triazolo[ 1 ,5-a] pyridin-2-ylamine (3)

[00158] To a suspension of hydroxylamine hydrochloride (101.8 g, 1.465 mol) in EtOH/MeOH (1 : 1, 900 mL) was added NN-diisopropylethylamine (145.3 mL, 0.879 mol) and the mixture was stirred at room temp. (20 °C) for 1 h. l-(6-Bromo-pyridin-2-yl)-3-carboethoxy-thiourea (2) (89.0 g, 0.293 mol) was then added and the mixture slowly heated to reflux (Note: bleach scrubber was required to quench H₂S evolved). After 3 h at reflux, the mixture was allowed to cool and filtered to collect the precipitated solid. Further product was collected by evaporation in vacuo of the filtrate, addition of H₂0 (250 mL) and filtration. The combined solids were washed successively with H₂0 (250 mL), EtOH/MeOH (1 : 1, 250 mL) and Et₂0 (250 mL) then dried in vacuo to afford the triazolopyridine derivative (3) as a solid. The compound was used as such in the next step without any purification.

[00159] ^lH (400 MHz, DMSO-i¼) δ 7.43-7.34 (2H, m, 2 x aromatic-H), 7.24 (1H, dd, J 6.8 and 1.8 Hz, aromatic-H), 6.30 (2H, br, NH₂); m/z 213/215 (1 : 1, M+H⁺, 100%).

1.1.2. Synthesis of 4-[ 4-(4, 4, 5, 5-Tetramethyl-f 1, 3,2] ‘ dioxaborolan-2-yl) -benzyl] ‘- thiomor holine- 1, 1 -dioxide (Intermediate 4)

[00160] 2-(4-Bromomethyl-phenyl)-4,4,5,5-tetramethyl-[l,3,2]dioxaborolane (1 eq) and DIPEA (2 eq) were dissolved in DCM/MeOH (5:1 v:v) under N₂ and thiomorpholine 1,1 -dioxide (2 eq) was added portion wise. The resulting solution was stirred at room temperature for 16h. After this time, the reaction was complete. The solvent was evaporated. The compound was extracted with EtOAc and water, washed with brine and dried over anhydrous MgSO i. Organic layers were filtered and evaporated. The final compound was isolated without further purification.

1.1.3. Synthesis of 5-[4-(l, l-Dioxothiomorpholin-4-ylmethyl)-phenyl]-[l,2,4]triazolo[l,5- a ridin-2-ylamine (Formula I)

[00161] 4-[4-(4,4,5,5-Tetramethyl-[l,3,2]dioxaborolan-2-yl)-benzyl]-thiomorpholine-l,l-dioxide (l .leq.) was added to a solution of 5-bromo-[l,2,4]triazolo[l,5-a]pyrid in-2-ylamine (4: 1). K₂CO₃ (2 eq.) and PdC^dppf (0.03 eq.) were added to the solution. The resulting mixture was then heated in an oil bath at 90°C for 16h under N₂. Water was added and the solution was extracted with ethyl acetate. The organic layers were dried over anhydrous MgSC>4 and evaporated in vacuo. The final compound was obtained after purification by flash chromatography.

[00162] ^lH (400 MHz, CDC1₃) δ 7.94-7.92 (d, 2H), 7.52-7.48 (m, 3H), 7.37-7.34 (m, 1H), 7.02-7.00 (m, 1H), 6.00 (d, 2H), 3.76 (d, 2H), 3.15-3.13 (m, 4H), 2.93-2.91 (m, 4H).

[00163] m/z 358.2 (M+H⁺, 100%). 1.2. Route 2

1.2.1. Cyclopropanecarboxylic acid {5-[4-(l, l-dioxo-thiomorpholin-4-ylmethyl)-phenylJ- [l,2,4]triazolo[l,5-a]pyridin-2-yl}-amide (Formula II)

[00164] The compound according to Formula II may be synthesized according to the procedure described in WO 2010/149769.

1.2.2. Synthesis of 5-[4-(l, l-Dioxothiomorpholin-4-ylmethyl)-phenyl]-[l,2,4]triazolo[l,5- aJpyridin-2-ylamine (Formula I)

[00165] The compound according to Formula I can also be produced by hydrolysis of the compound accor ing to Formula II:

[00166] Hydrochloric acid 30% aq (12.06 kg; 3.9 rel. volumes) was added to a slurry of the compound according to Formula II (3.45 kg; 1.0 equiv.) in demineralized water (10.0 kg; 3.0 rel. volumes). Subsequently, a line rinse was performed with demineralized water (3.4 kg; 1.0 rel. volumes). The reaction mixture was heated to 80±5°C for 14.5 h. After completion of the reaction (conversion > 99%>), the reaction mixture was cooled to 20±5°C. The reaction mixture was diluted with demineralized water (6.8 kg; 2.0 rel. volumes) and sodium hydroxide 33%> aq (9.52 kg; 3.7 rel volumes) was dosed at such a rate that the temperature of the reactor contents remained below 35°C. An additional amount of sodium hydroxide 33%> aq (2.55 kg; 1.0 rel. volumes) was needed to get the pH > 10. The product was filtered off, washed twice with demineralized water (1.5 rel. volumes) and dried under vacuum for 1 h, thus yielding the crude compound according to Formula I.

[00167] The crude compound according to Formula I (5.70 kg) was re-slurried in demineralized water (23.0 kg; 8.5 rel. volumes). Hydrochloric acid 30%> aq (1.65 kg; 0.7 rel. volumes) and demineralized water (4.3 kg; 1.6 rel. volumes) were added and the reaction mixture was stirred at 20±5°C for 45 min. As the compound according to Formula I was not dissolved completely, the reaction mixture was stirred at 45±5°C for 1 h. The reaction mixture was filtered and the residue was washed with demineralized water (2.0 kg 0.75 rel. volumes). Sodium hydroxide 33%> aq (1.12 kg; 0.6 rel volumes) was added to the filtrate. An additional amount of sodium hydroxide 33%> aq (1.01 kg) was needed to get the pH > 10. The resulting reaction mixture was stirred at 20±5°C for about 3 h. The product was filtered off, washed twice with demineralized water (4.1 kg; 1.5 rel. volumes), and twice with methyl tert-butyl ether (MTBE; 3.0 kg; 1.5 rel. volumes) and dried under vacuum for 15.5 h on the filter. The product was further dried in a vacuum oven at 40±5°C for 202 h, thus affording the desired compound according to Formula I.

Update

WO-2016179207

Scheme 1: General S nthesis of Compounds of Formula I or A

Formula A

Scheme 7.

(16) (17) (18)

(18a): R^3a=R^3b=R^2a=R (18b): R^3a=R^3b=D; R^2a 18c): R^3a=R^3b=H; R^2a

References

Namour, Florence; Diderichsen, Paul Matthias; Cox, Eugène; Vayssière, Béatrice; Van der Aa, Annegret; Tasset, Chantal; Van’t Klooster, Gerben (2015-02-14). “Pharmacokinetics and Pharmacokinetic/Pharmacodynamic Modeling of Filgotinib (GLPG0634), a Selective JAK1 Inhibitor, in Support of Phase IIB Dose Selection”. Clin Pharmacokinet. Epub ahead of print.doi:10.1007/s40262-015-0240-z.
Van Rompaey, L; Galien, R; Van der Aar, E; Clement-Lacroix, P; Van der Aar, E; Nelles, L; Smets, B; Lepescheux, L; Cristophe, T; Conrath, K; Vandeghinste, N; Vayssiere, B; De Vos, S; Fletcher, S; Brys, R; Van’t Klooster, G; Feyen, J; Menet, C (2013-10-01). “Preclinical characterization of GLPG0634, a selective inhibitor of JAK1 for the treatment of inflammatory diseases”. J Immunol. 191(7). doi:10.4049/jimmunol.1201348.
http://acrabstracts.org/abstracts/phase-1-and-phase-2-data-confirm-that-glpg0634-a-selective-jak1-inhibitor-has-a-low-potential-for-drug-drug-interactions/
“Galapagos’ GLPG0634 shows excellent efficacy and safety in rheumatoid arthritis Phase II study” (PDF) (Press release). Retrieved 2015-02-26.
“Galapagos reports that the last patient in DARWIN 1 has completed 12 weeks of treatment” (PDF) (Press release). Retrieved 2015-02-26.
“Galapagos completes recruitment for Darwin 1 study with GLPG0634 (filgotinib) in RA”. EuroInvestor. Retrieved 2015-02-26.
NASDAQ OMX Corporate Solutions. “Galapagos completes recruitment for Darwin 2 monotherapy study with GLPG0634 (filgotinib) in RA”. Yahoo Finance. Retrieved 2015-02-26.

US8551980	Nov 17, 2010	Oct 8, 2013	Bayer Intellectual Property Gmbh	Substituted triazolopyridines
US8796457	Jun 25, 2010	Aug 5, 2014	Galapagos Nv	Compound useful for the treatment of degenerative and inflammatory diseases

Filgotinib
Systematic (IUPAC) name

N-[5-[4-[(1,1-dioxo-1,4-thiazinan-4-yl)methyl]phenyl]-[1,2,4]triazolo[1,5-a]pyridin-2-yl]cyclopropanecarboxamide
Clinical data
Routes of administration	Oral
Pharmacokinetic data
Biological half-life	6 hours^[1]
Identifiers
CAS Registry Number	1206161-97-8
ATC code	L01XE18
IUPHAR/BPS	7913
ChemSpider	28189566
UNII	3XVL385Q0M
ChEMBL	CHEMBL3301607
Chemical data
Formula	C₂₁H₂₃N₅O₃S
Molecular mass	425.50402 g/mol

Patent	Submitted	Granted
Compound useful for the treatment of degenerative and inflammatory diseases [US8088764]	2010-12-30	2012-01-03
NOVEL COMPOUNDS USEFUL FOR THE TREATMENT OF DEGENERATIVE AND INFLAMMATORY DISEASES [US2011190260]	2011-08-04

सुकून उतना ही देना प्रभू, जितने से जिंदगी चल जाये। औकात बस इतनी देना, कि औरों का भला हो जाये।

DRUG APPROVALS BY DR ANTHONY MELVIN CRASTO …..FOR BLOG HOME CLICK HERE

Join me on Linkedin

Join me on Facebook FACEBOOK

Join me on twitter

Join me on google plus Googleplus

Join me on Researchgate

amcrasto@gmail.com

09b37-misc2b027 LIONEL MY SON

He was only in first standard in school when I was hit by a deadly one in a million spine stroke called acute transverse mylitis, it made me 90% paralysed and bound to a wheel chair, Now I keep him as my source of inspiration and helping millions, thanks to millions of my readers who keep me going and help me to keep my son happy

सुकून उतना ही देना प्रभू, जितने से

जिंदगी चल जाये।

औकात बस इतनी देना,

कि औरों का भला हो जाये।

Read all about Organic Spectroscopy on ORGANIC SPECTROSCOPY INTERNATIONAL

/////////Galapagos, GLPG0634, Filgotinib, PHASE 2, orphan drug designation, PHASE 3, Crohn’s disease, Rheumatoid arthritis, Ulceraticolitis

ve SMILES code: O=C(C1CC1)NC2=NN3C(C4=CC=C(CN5CCS(CC5)(=O)=O)C=C4)=CC=CC3=N2

Tazemetostat

April 27, 2015 3:59 am / Leave a comment

Tazemetostat

Current developer: Epizyme, Inc., Cambridge, MA 02139.

EPZ-6438 (Tazemetostat)
CAS: 1403254-99-8

HBR 1467052-75-0

タゼメトスタット臭化水素酸塩

Current developer: Epizyme, Inc., Cambridge, MA 02139.

EPZ-6438 (Tazemetostat)
CAS: 1403254-99-8

HBR

Chemical Formula: C34H44N4O4
Exact Mass: 572.33626

USFDA APPROVED 23/1/2020 AS HBR SALT, TAZVERIK, EPIZYME

N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[1,1′-biphenyl]-3-carboxamide
SIMLES: O=C(C1=CC(C2=CC=C(CN3CCOCC3)C=C2)=CC(N(CC)C4CCOCC4)=C1C)NCC5=C(C)C=C(C)NC5=O

(1,1′-Biphenyl)-3-carboxamide, N-((1,2-dihydro-4,6-dimethyl-2-oxo-3-pyridinyl)methyl)-5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(4-morpholinylmethyl)-

N-((4,6-Dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-(ethyl(oxan-4-yl)amino)-4-methyl-4′-((morpholin-4-yl)methyl)(1,1′-biphenyl)-3-carboxamide

UNII-Q40W93WPE1

Tazemetostat, sold under the brand name Tazverik, is a medication used for the treatment of adults and adolescents aged 16 years and older with metastatic (when cancer cells spread to other parts of the body) or locally advanced (when cancer has grown outside the organ it started in, but has not yet spread to distant parts of the body) epithelioid sarcoma not eligible for complete resection (surgically removing all of a tissue, structure, or organ).^[1]

Tazemetostat is a cancer drug that acts as a potent selective EZH2 inhibitor.^[2]

Tazemetostat blocks activity of the EZH2 methyltransferase, which may help keep the cancer cells from growing.^[1] Most cases of epithelioid sarcoma begin in the soft tissue under the skin of an extremity, though it can start in other areas of the body.^[1] Surgical removal is considered the main treatment when the cancer is localized to one area of the body.^[1] Chemotherapy or radiation may also be given.^[1] However, there is a high likelihood for local and regional spread of the disease even with treatment and approximately 50% of patients have metastatic disease at the time of diagnosis.^[1] Metastatic disease is considered life-threatening to the patient.^[1]

The most common side effects are pain, fatigue, nausea, decreased appetite, vomiting and constipation.^[1] People taking tazemetostat are at increased risk of developing secondary malignancies including: T-cell lymphoblastic lymphoma (a type of blood cancer that affects the lymphatic system usually found in the lymph nodes), myelodysplastic syndrome (a disorder resulting from poorly formed or dysfunctional blood cells) and acute myeloid leukemia (a cancer of the blood and bone marrow).^[1]

According to the NCI Drug Dictionary, “tazemetostat is an orally available, small molecule selective and S-adenosyl methionine (SAM) competitive inhibitor of histone methyl transferase EZH2, with potential antineoplastic activity. Upon oral administration, tazemetostat selectively inhibits the activity of both wild-type and mutated forms of EZH2. Inhibition of EZH2 specifically prevents the methylation of histone H3 lysine 27 (H3K27). This decrease in histone methylation alters gene expression patterns associated with cancer pathways and results in decreased tumor cell proliferation in EZH2 mutated cancer cells. EZH2, which belongs to the class of histone methyltransferases (HMTs), is overexpressed or mutated in a variety of cancer cells and plays a key role in tumor cell proliferation.”^[3]

History

The U.S. Food and Drug Administration (FDA) approved tazemetostat in January 2020,^[1] based on the results of a clinical trial (NCT02601950) enrolling 62 subjects with metastatic or locally advanced epithelioid sarcoma.^[1]^[4] During the clinical trial, subjects received 800 milligrams (mg) of tazemetostat twice a day until the disease progressed or the subject reached an unacceptable level of toxicity.^[1]^[4] Tumor response assessments were performed every eight weeks during the clinical trial.^[1] The trial measured how many subjects experienced complete or partial shrinkage (by a certain amount) of their tumors during treatment (overall response rate).^[1] The overall response rate was 15%, with 1.6% of subjects having a complete response and 13% having a partial response.^[1] Of the nine subjects that had a response, six (67%) subjects had a response lasting six months or longer.^[1]

The trial was conducted at 22 sites in France, United Kingdom, Taiwan, Italy, Canada, Belgium, and the United States.^[4]

The FDA granted the application for tazemetostat accelerated approval and orphan drug designation.^[1] The FDA granted the approval of Tazverik to Epizyme Inc.^[1]

PATENT

PRODUCT PAT

US 8410088 EXP 21/1/2034

WO 2012142504

US 9090562 EXP 13/4/32

SEE Proceedings of the National Academy of Sciences of the United States of America (2013), 110(19), 7922-7927, S7922/1-S7922/5….http://www.pnas.org/content/110/19/7922.abstract

http://www.epizyme.com/wp-content/uploads/2014/11/Ribrag-ENA-FINAL.pdf

2D chemical structure of 1403254-99-8

Tazemetostat, also known as EPZ-6438, is a potent, selective, and orally bioavailable small-molecule inhibitor of EZH2 enzymatic activity. EPZ-6438 induces apoptosis and differentiation specifically in SMARCB1-deleted MRT cells.

Treatment of xenograft-bearing mice with EPZ-6438 leads to dose-dependent regression of MRTs with correlative diminution of intratumoral trimethylation levels of lysine 27 on histone H3, and prevention of tumor regrowth after dosing cessation.

These data demonstrate the dependency of SMARCB1 mutant MRTs on EZH2 enzymatic activity and portend the utility of EZH2-targeted drugs for the treatment of these genetically defined cancers. EPZ-6438 is currently in clinical trials.

Epizyme, Inc., Eisai R&D Management Co.Ltd.

Epizyme is developing tazemetostat, a lead from several small molecule EZH2 inhibitors, for treating cancer (phase 1 clinical, as of April 2015). Japanese licensee Eisai was developing the program for the potential oral treatment of cancers, including non-Hodgkin’s lymphoma; however, in March 2015, Epizyme regained worldwide, ex-Japan, rights to the program.

It appeared that Eisai was planning to investigate the program in Japan .

WO-2015057859 From, Eisai Research Institute; Epizyme Inc, indicates Novel crystalline polymorphic form C of tazemetostat, useful for treating an EZH2-mediated cancer, including non-Hodgkin’s lymphoma and breast cancer.

see WO2013155317, claiming novel hydrobromide salt of tazemetostat.

PREDICT

………………………………….

PATENT

WO 2012142504

http://www.google.com/patents/WO2012142504A1?cl=en

Example 44: Synthesis of N-((4,6-dimethyl-2-oxo-l ,2-dihydropyridin-3- yl)methyl)-5-(ethyl (tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(moφholinomethyl)-[l , – biphenyl]-3-carboxamide

Compound 44

[Step 1 : Synthesis of 5-brom -2-methyl-3-nitrobenzoic acid

To stirred solution of 2-methyl-3-nitrobenzoic acid ( 100 g, 552 mmol) in cone. H₂S0₄ (400 mL), 1 ,3-dibromo-5,5-dimethyl-2,4-imidazolidinedione (88 g, 308 mmol) was added in a portion wise manner at room temperature and the reaction mixture was then stirred at room temperature for 5 h. The reaction mixture was poured onto ice cold water, the precipitated solid was filtered off, washed with water and dried under vacuum to afford the desired compound as a solid ( 140 g, 98%). The isolated compound was taken directly into the next step. Ή NMR (DMSO-4$, 400 MHz) δ 8.31 (s, 1 H), 8.17 (s, 1 H), 2.43 (s, 3H).

Step 2: Synthesis of methyl -bromo-2-methyl-3-nitrobenzoate

To a stirred solution of 5-bromo-2-methyl-3-nitrobenzoic acid (285 g, 1 105 mmol) in DMF (2.8L) at room temperature was added sodium carbonate (468 g, 4415 mmol) followed by addition of methyl iodide (626.6 g, 4415 mmol). The resulting reaction mixture was heated at 60 °C for 8 h. After completion (monitored by TLC), the reaction mixture was filtered (to remove sodium carbonate) and washed with ethyl acetate ( 1 L X 3). The combined filtrate was washed with water (3L X 5) and the aqueous phase was back extracted with ethyl acetate (1L X 3). The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford the title compound as a solid (290g, 97% yield). The isolated compound was taken directly into the next step. Ή NMR (CDC1₃, 400 MHz) δ 8.17 (s, 1H), 7.91 (s, 1H), 3.96 (s, 3H), 2.59 (s, 3H).

Step 3: Synthesis of methyl 3-amino-5-bromo-2-methylbenzoate

To a stirred solution of methyl 5-bromo-2-methyl-3-nitrobenzoate (290 g,

1058 mmol) in ethanol (1 .5L) was added aqueous ammonium chloride (283 g, 5290 mmol dissolved in 1.5L water). The resulting mixture was stirred at 80°C to which iron powder (472 g, 8451 mmol) was added in a portion wise manner. The resulting reaction mixture was heated at 80 °C for 12 h. Upon completion as determined by TLC, the reaction mixture was hot filtered over celite® and the celite bed was washed with methanol (5L) followed by washing with 30% MeOH in DCM (5L). The combined filtrate was concentrated in-vacuo, the residue obtained was diluted with aqueous sodium bicarbonate solution (2L) and extracted with ethyl acetate (5L X 3). The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford the title compound as a solid (220 g, 85%). The compound was taken directly into the next step. Ή NMR (CDC1₃, 400 MHz) δ 7.37 (s, 1 H), 6.92 (s, 1 H), 3.94 (s, 3H), 3.80 (bs, 2H), 2.31 (s, 3H).

Step 4: Synthesis of methyl 5-bromo-2-methyl-3-((tetrahydro-2H-pyran-4-yl) amino) benzoate

To a stirred solution of methyl 3-amino-5-bromo-2-methylbenzoate (15 g, 61 .5 mmol) and dihydro-2H-pyran-4(3)-one (9.2 g, 92 mmol) in dichloroethane (300 mL) was added acetic acid (22 g, 369 mmol) and the reaction mixture stirred at room temperature for 15 minutes, then the reaction mixture was cooled to 0°C and sodium triacetoxyborohydnde (39 g, 184 mmol) was added. The reaction mixture was stirred overnight at room temperature. Upon completion of the reaction as determined by TLC, aqueous sodium bicarbonate solution was added to the reaction mixture until a pH of 7-8 was obtained. The organic phase was separated and the aqueous phase was extracted with ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude compound was purified by column chromatography (100-200 mesh silica gel) eluting with ethyl acetate: hexane to afford the desired compound as a solid ( 14 g, 69%). ‘H NMR (DMSO-<fc, 400 MHz) δ 7.01 (s, 1 H), 6.98 (s, 1 H), 5.00 (d, 1 H, J=7.6 Hz), 3.84-3.87 (m, 2H), 3.79 (s, 31 1), 3.54-3.56 (m_f 1 H), 3.43 (L 21 1, J 12 Hz), 2.14 (s. 31 1). 1 . 1 – 1 .84 (m_: 211). 1 .47- 1 .55 (m, 2H).

Step 5: Synthesis of methyl 5-bromo-3-(ethyl (tetrahydro-2H-pyran-4-yl) amino)-2- methylbenzoate

triacetoxyborohydnde (27 g, 128 mmol) was added. The reaction mixture was stirred at room temperature for 3 hours. Upon completion of the reaction as determined by TLC, aqueous sodium bicarbonate solution was added to the reaction mixture until a pH 7-8 was obtained, the organic phase was separated and the aqueous phase was extracted with ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude compound was purified by column chromatography (100- 200 mesh silica gel) eluting with ethyl acetate: hexane to afford the desired compound as a viscous liquid (14 g, 93%). Ή NMR (DMSO-cfo 400 MHz) δ 7.62 (s, 1 H), 7.52 (s, 1 H), 3.80 (bs, 5H), 3.31 (t, 2H), 2.97-3.05 (m, 2H), 2.87-2.96 (m, 1 H), 2.38 (s, 3H), 1.52-1.61 (m, 2H), 1 .37-1.50 (m, 2H), 0.87 (t, 3H, J=6.8 Hz).

Step 6: Synthesis of 5-bromo-N-((4, 6-dimethyl-2-oxo-l , 2-dihydropyridin-3-yl) methyl)-3 -(ethyl (tetrahydro-2H-pyra -4-yl) amino)-2-methylbenzamide

To a stirred solution of 5-bromo-3-(ethyl (tetrahydro-2H-pyran-4-yl) amino)-2- methylbenzoate (14 g, 39.4 mmol) in ethanol ( 100 mL) was added aqueous NaOH (2.36 g, 59.2 mmol in 25mL water) and the resulting mixture was stirred at 60 °C for 1 h. Upon completion of the reaction as determined by TLC, the solvent was removed under reduced pressure and the residue obtained was acidified with IN HC1 until a pH 7 was obtained and then aqueous citric acid solution was added until a pH 5-6 was obtained. The aqueous layer was extracted with 10% MeOH in DCM (200mL X 3), the combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give the respective acid (14 g, 100%).

The above acid (14 g, 40.9 mmol) was then dissolved in DMSO (70 mL) and 3- (amino methyl)-4, 6-dimethylpyridin-2( l H)-one ( 12.4 g, 81 .9 mmol) was added to it. The reaction mixture was stirred at room temperature for 15 minutes, then PYBOP (31.9 g, 61.4 mmol) was added and stirring was continued for overnight at room temperature. Upon completion of the reaction as determined by TLC, the reaction mixture was poured onto ice- cold water (700 mL), stirred for 30 minutes and the precipitated solid was collected by filtration, washed with water (500 mL) and air dried. The solid obtained was stirred with acetonitrile (75mL X 2), filtered and air dried. The solid obtained was again stirred with 5% MeOH in DCM ( l OOmL), filtered and dried completely under vacuum to afford the title compound as a solid ( 14 g, 74 %). Ή NMR (DMSO- ₆, 400 MHz) δ 1 1.47 (s, 1 H), 8.23 (t, 1 H), 7.30 (s, 1 H), 7.08 (s, 1 H), 5.85 (s, 1 H), 4.23 (d, 2H, J=4.4 Hz), 3.81 (d, 2H, J=l 0.4 Hz), 3.20-3.26 (m, 2H), 3.00-3.07 (m, I H), 2.91 -2.96 (m, 2H), 2.18 (s, 3H), 2.14 (s, 3H), 2.10 (s, 3H), 1.58-1.60 (m, 2H), 1.45-1.50 (m, 2H), 0.78 (t, 3H, J=6.8 Hz).

Step 7: Synthesis of N-((4, 6-dimethyl-2-oxo-l , 2-dihydropyridin-3-yl) methyl)-5- (ethyl (tetrahydro-2H-pyran-4-yl) amino)-4-methyl-4′-(morpholinomethyl)-[l , l ‘-biphenyl]-3- carboxamide

TITLE COMPD

To a stirred solution of 5-bromo-N-((4, 6-dimethyl-2-oxo-l , 2-dihydropyridin-3-yl) methyl)-3-(ethyl (tetrahydro-2H-pyran-4-yl) amino)-2-methylbenzamide (14 g, 29.5 mmol) in dioxane/ water mixture (70 mL/ 14 mL) was added 4-(4-(4, 4, 5, 5-tetramethyl- l , 3, 2- dioxaborolan-2-yl) benzyl) morpholine (13.4 g, 44.2 mmol) followed by addition of Na₂C0₃ (1 1 .2 g, 106.1 mmol). The solution was purged with argon for 15 minutes and then Pd (PPh₃)₄ (3.40 g, 2.94 mmol) was added and the solution was again purged with argon for a further 10 min. The reaction mixture was heated at 100°C for 4 h. After completion (monitored by TLC), the reaction mixture was diluted with water and extracted with 10% MeOH/DCM.

The combined organic layers were dried over anhydrous sodium sulphate, filtered and concentrated under reduced pressure. The crude compound was purified by column chromatography (100- 200 mesh silica gel) eluting with methanol: DCM to the title compound as a solid (12 g, 71 %).

Analytical Data: LCMS: 573.35 (M + 1 )⁺; HPLC: 99.5% (@ 254 nm) (R,;3.999; Method: Column: YMC ODS-A 1 50 mm x 4.6 mm x 5 μ; Mobile Phase: A; 0.05% TFA in water/ B; 0.05% TFA in acetonitrile; Inj. Vol : 10 μΐ, Col. Temp.: 30 °C; Flow rate: 1 .4 mL/min.;

Gradient: 5% B to 95% B in 8 min, Hold for 1 .5 min, 9.51 -12 min 5% B);

Ή NMR (DMSO-i ₆, 400 MHz) 5 1 1 .46 (s, I H), 8. 19 (t, 1 H), 7.57 (d, 2H, J=7.2 Hz), 7.36-7.39 (m, 3H), 7.21 (s, I H), 5.85 (s, I H), 4.28 (d, 2H, J=2.8 Hz), 3.82 (d, 2H, J=9.6 Hz), 3.57 (bs, 4H), 3.48 (s, 2H), 3.24 (t, 2H, J=10.8Hz), 3.07-3.09 (m, 2H), 3.01 (m, I H), 2.36 (m, 4H), 2.24 (s, 3H), 2.20 (s, 3H), 2.10 (s, 3H), 1 .64-1 .67 (m, 2H), 1 .51 – 1 .53 (m, 2H), 0.83 (t, 3H, J=6.4 Hz).

TRIHYDROCHLORIDE

Step 8: Synthesis of N-((4,6-dimethyl-2-oxo-l ,2-dihydropyridin-3-yl)methyl)-5- (ethyl (tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[ 1 , 1 ‘-biphenyl]-3- carboxamide trihydrochloride

N-((4, 6-dimethyl-2-oxo-l , 2-dihydropyridin-3-yl) methyl)-5-(ethyl (tetrahydro- 21 l-pyran-4-yl) amino)-4-methyI-4′-(niorpholinornethyl)-[ 1 , 1 ‘-biphenyl]-3-carboxamide ( 12 g, 21.0 mmol) was dissolved in methanolic HC1 (200 mL) and stirred at room temperature for 3 h. After three hours of stirring, the reaction mixture was concentrated under reduced pressure. The solid obtained was stirred with ether ( l OOmL X 2) to afford the desired salt as a solid ( 1 1 g, 77 %).

Analytical Data of the tri-HCl salt: LCMS: 573.40 (M + 1 )⁺; HPLC: 99.1 % (@ 254 nm) (R,;3.961 ; Method: Column: YMC ODS-A 150 mm x 4.6 mm x 5 μ; Mobile Phase: A; 0.05% TFA in water/ B; 0.05% TFA in acetonitrile; Inj. Vol: 10 pL, Col. Temp.: 30 °C; Flow rate: 1.4 mL/min.; Gradient: 5% B to 95% B in 8 min, Hold for 1.5 min, 9.51 -12 min 5% B);

Ή NMR (D₂0 400 MHz) δ 7.92 (bs, I H,) 7.80 (s, I H), 7.77 (d, 2H, J=8 Hz), 7.63 (s, I H), 7.61 (s, I H), 6.30 (s, I H), 4.48 (s, 2H), 4.42 (s, 2H), 4.09-4.1 1 (m, 4H), 3.95-3.97 (m, 2H), 3.77 (t, 3H, J=10.4 Hz), 3.44-3.47 (m, 3H), 3.24-3.32 (m, 3H), 2.42 (s, 3H), 2.35 (s, 3H), 2.26 (s, 3H), 2.01 (m, 2H), 1 .76 (m, 2H), 1 .04 (t, 3H, J=6.8 Hz).

…………………………………………

PATENT

WO2013155317

http://www.google.com/patents/WO2013155317A1?cl=en

N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3- yl)methyl)-5-(ethyl (tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[l,l’- biphenyl] -3-carboxamide hydrobromide:

N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3-yl)methyl)-5-(ethyl

(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[l,l’-biphenyl]-3- carboxamide hydrobromide:

As used herein, “Compound I” refers to N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3- yl)methyl)-5-(ethyl (tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[l,l’- biphenyl]-3-carboxamide. The hydrobromide of Compound I can be used to inhibit the histone methyltransferase activity of EZH2, either in a subject or in vitro. The hydrobromide of Compound I can also be used to treat cancer in a subject in need thereof.

Scheme 1

……………………………………..Compound I Compound I – HBr

HPLC

HPLC was conducted on an Agilent 1200 HPLC quaternary pump, low pressure mixing, with an in-line degasser. Analytical method conditions: 8 μΐ_^ sample (20 mg of ER-581982-06 diluted with 50 mL of a methanol to provide approximately 0.4 mg/mL solution) was injected onto a Agilent Zorbax Eclipse XDB-C18 (4.6 x 150 mm, 3.5 um), Chromatography conditions: mobile phase A, water with 5mM ammonium formate; mobile phase B, 5 mM ammonium formate in 50/45/5 acetonitrile/methanol/water; flow rate, 1.5 ml/min.; gradient: isocratic at 10% B from 0 to 3 min; linear increase to 70% B from 3 to 7 min; isocratic at 70% B from 7 to 12 min; linear increase to 100% B from 12 to 15 min isocratic at 100% B from 15 to 20 min;

column temperature, 35 °C; detection, UV 230 nm. Approximate retention time of Compound I = 10.7 min.

Synthesis of Polymorph A

5-bromo-2-methyl-3-nitrobenzoic acid stirred solution of 2-methyl-3-nitrobenzoic acid (100 g, 552 mmol) in cone. H₂S0₄ (400 mL), l,3-dibromo-5,5-dimethyl-2,4- imidazolidinedione (88 g, 308 mmol) was added in a portion wise manner at room temperature and the reaction mixture was then stirred at room temperature for 5 h. The reaction mixture was poured onto ice cold water, the precipitated solid was filtered off, washed with water and dried under vacuum to afford the desired compound as a solid (140 g, 98%). The isolated compound was taken directly into the next step. 1H NMR (DMSO-J₆, 400 MHz) δ 8.31 (s, 1H), 8.17 (s, 1H), 2.43 (s, 3H).

Methyl 5-bromo-2-methyl-3-nitrobenzoate To a stirred solution of 5-bromo-2- methyl-3-nitrobenzoic acid (285 g, 1105 mmol) in DMF (2.8L) at room temperature was added sodium carbonate (468 g, 4415 mmol) followed by addition of methyl iodide (626.6 g, 4415 mmol). The resulting reaction mixture was heated at 60 °C for 8 h. After completion (monitored by TLC), the reaction mixture was filtered (to remove sodium carbonate) and washed with ethyl acetate (1L X 3). The combined filtrate was washed with water (3L X 5) and the aqueous phase was back extracted with ethyl acetate (1L X 3). The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford the title compound as a solid (290g, 97% yield). The isolated compound was taken directly into the next step. 1H NMR (CDC1₃, 400 MHz) δ 8.17 (s, 1H), 7.91 (s, 1H), 3.96 (s, 3H), 2.59 (s, 3H).

Methyl 3-amino-5-bromo-2-methylbenzoate (1) To a stirred solution of methyl 5- bromo-2-methyl-3-nitrobenzoate (290 g, 1058 mmol) in ethanol (1.5L) was added aqueous ammonium chloride (283 g, 5290 mmol dissolved in 1.5L water). The resulting mixture was stirred at 80°C to which iron powder (472 g, 8451 mmol) was added in a portion wise manner. The resulting reaction mixture was heated at 80 °C for 12 h. Upon completion as determined by TLC, the reaction mixture was hot filtered over celite® and the celite bed was washed with methanol (5L) followed by washing with 30% MeOH in DCM (5L). The combined filtrate was concentrated in- vacuo, the residue obtained was diluted with aqueous sodium bicarbonate solution (2L) and extracted with ethyl acetate (5L X 3). The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford the title compound as a solid (220 g, 85%). The compound was taken directly into the next step. 1H

NMR (CDCI₃, 400 MHz) δ 7.37 (s, 1H), 6.92 (s, 1H), 3.94 (s, 3H), 3.80 (bs, 2H), 2.31 (s, 3H).

Methyl 5-bromo-2-methyl-3-((tetrahydro-2H-pyran-4-yl) amino) benzoate (2) A reactor was charged with methyl 3-amino-5-bromo-2-methylbenzoate (455.8 g, 1.87 mol), 1,2- Dichloroethane (4.56 L), and acetic acid (535 ml, 9.34 mol). To the mixture were added dihydro-2H-pyran-4(3H)-one (280 g, 2.80 mol) and sodium triacetoxyborohydride (594 g, 2.80 mol) maintaining the internal temperature below 40 °C. The mixture was stirred at 25 °C for 2.5 h and then the reaction was quenched with a solution of sodium hydroxide (448 g, 11.20 mol) in water (5.61 L). After stirring for 20 minutes at ambient temperature, the organic layer was separated and the aqueous layer was extracted with ethyl acetate (3.65 L). The organic layers were combined, washed with brine (1.5 L), and concentrated under vacuum.

The residue was treated with ethyl acetate (1.8 L) and heated to 65-70 °C. The mixture was stirred at 65-70 °C for 15 minutes to give a clear solution and then treated with n-heptane (7.3 L) maintaining the temperature between 60-70 °C. Once the heptane was completely added to the solution, the mixture was held at 65-70 °C for 15 minutes and then allowed to cool to 18- 22 °C over 3 h. The resulting suspension was stirred at 18-22 °C for 4 h, cooled to 0-5 °C over 1 h, and held at 0-5 °C for 2 h. The precipitate was filtered, washed twice with n-heptane (1.4 L), and dried under vacuum to give the title compound (540 g, 88%). The XRPD pattern of this compound is shown in Figure 17.

Methyl 5-bromo-3-(ethyl (tetrahydro-2H-pyran-4-yl) amino)-2-methylbenzoate (3)

To a stirred solution of methyl 5-bromo-2-methyl-3-((tetrahydro-2H-pyran-4-yl) amino) benzoate (14 g, 42.7 mmol) in dichloroethane (150 mL) was added acetaldehyde (3.75 g, 85.2 mmol) and acetic acid (15.3 g, 256 mmol). The resulting reaction mixture was stirred at room temperature for 15 minutes. The mixture was cooled to 0 °C and sodium triacetoxyborohydride (27 g, 128 mmol) was added. The reaction mixture was stirred at room temperature for 3 hours. Upon completion of the reaction as determined by TLC, aqueous sodium bicarbonate solution was added to the reaction mixture until a pH 7-8 was obtained, the organic phase was separated and the aqueous phase was extracted with ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude compound was purified by column chromatography (100-200 mesh silica gel) eluting with ethyl acetate: hexane to afford the desired compound as a viscous liquid (14 g, 93%). 1H NMR DMSO-d₆, 400 MHz) δ 7.62 (s, 1H), 7.52 (s, 1H), 3.80 (bs, 5H), 3.31 (t, 2H), 2.97-3.05 (m, 2H), 2.87-2.96 (m, 1H), 2.38 (s, 3H), 1.52-1.61 (m, 2H), 1.37-1.50 (m, 2H), 0.87 (t, 3H, J=6.8 Hz).

Methyl 5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-

[l,l’-biphenyl]-3-carboxylate (4): A mixture of methyl 5-bromo-3-(ethyl(tetrahydro-2H-pyran- 4-yl)amino)-2-methylbenzoate (580 g, 1.63 mol), 4-(4-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan- 2-yl)benzyl)morpholine (592 g, 1.95 mol), 1,4-dioxane (3.86 L), sodium carbonate (618 g, 5.83 mol), and water (771 ml) was degassed by bubbling nitrogen through the mixture at 20 °C for 20 minutes and treated with tetrakis(triphenylphosphine)palladium(0) (14.11 g, 12.21 mmol). The resulting mixture was degassed for an additional 20 minutes and then heated to 87-89 °C for 17 h. After cooling to 20 °C, the mixture was diluted with ethyl acetate (5.80 L) and a solution of (R)-2-Amino-3-mercaptopropionic acid (232 g) in water (2.320 L). After stirring for 1 h at 20 °C, the organic layer was separated and washed again with a solution of (R)-2-Amino-3- mercaptopropionic acid (232 g) in water (2.320 L). The aqueous layers were combined and extracted with ethyl acetate (5.80 L). The organic layers were combined, washed with a solution of sodium hydroxide (93 g) in water (2.32 L), and concentrated under vacuum at 35 °C to give the title compound as an orange oil (1.21 kg, 164% yield).

5-(Ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[l,l’- biphenyl]-3-carboxylic acid (5): Methyl 5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′- (morpholinomethyl)-[l,l’-biphenyl]-3-carboxylate (69.0 g, 152.5 mmol) (based on the theoretical yield from the previous step) was suspended in ethanol (380 mL) and treated with a solution of sodium hydroxide (24.84 g, 621.0 mmol) in water (207 mL). The mixture was stirred at 40°C for 18 h. After cooling to 0-5 °C, the mixture was neutralized to pH 6.5 with 1 N hydrochloric acid (580 mL) maintaining the temperature below 25 °C. Then, the mixture was extracted twice with a mixture of dichloromethane (690 mL) and methanol (69.0 mL). The organic layers were combined and concentrated under vacuum to give a crude product as a yellow solid (127g).

The crude product was dissolved in 2-methyltetrahydrofuran (656 mL) at 70 °C and then treated with IPA (828 mL). The mixture was allowed to cool to rt over 3-4 h and then stirred overnight at rt. The precipitate was filtered, washed twice with IPA (207 mL), and dried under vacuum to give the title compound as an off white solid (53.54 g, 80%). The XRPD pattern of this compound is shown in Figure 9.

N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3-yl)methyl)-5-(ethyl(tetrahydro-2H- pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[l,l’-biphenyl]-3-carboxamide

(Compound I): A mixture of 5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′- (morpholinomethyl)-[l,l’-biphenyl]-3-carboxylic acid (540 g, 1.23 mol) and 3-(aminomethyl)- 4,6-dimethyl-dihydro-pyridin-2(lH)-one hydrochloride (279 g, 1.48 mol) was suspended in DMSO (2.70 L) and treated with triethylamine (223 ml, 1.60 mol). The mixture was stirred at 25 °C for 30 min and treated with EDC-HC1 (354 g, 1.85 mol) and HOBT hydrate (283 g, 1.85 mol). The reaction mixture was stirred at rt for 16 h. After addition of triethylamine (292 ml, 2.09 mol), the mixture was cooled to 15 °C, diluted with water (10.1 L) maintaining the temperature below 30 °C, and stirred at 19-25 °C for 4 h. The resulting precipitate was filtered, washed twice with water (2.70 L), and dried under vacuum to give a crude product (695 g, wt-wt analysis = 78%).

For the further purification of the product, recrystallization was conducted. A crude product (20.00 g, 34.92 mmol) was suspended in a mixture of ethanol (190 ml) and water (10.00 ml) and heated to 75°C until a clear solution was obtained. The solution was allowed to cool to rt overnight. The precipitate was filtered, washed twice with a mixture of ethanol (30.0 ml) and water (30.0 ml), and dried under vacuum at 35 °C to give the title compound as an off white solid (14.0 g, 70% recovery from the crude and 90% yield based on wt-wt assay).

4-((3′-(((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3-yl)methyl)carbamoyl)-5′- (ethyl(tetrahydro-2H-pyran-4-yl)amino)-4′-methyl-[l,l’-biphenyl]-4-yl)methyl)morpholin- 4-ium bromide (Polymorph A): A crude N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3- yl)methyl)-5-(ethyl(tetrahydro-2H-pyran-4-yl)am

biphenyl]-3-carboxamide (595 g, 464 g based on wt-wt assay, 810.3 mmol) was suspended in ethanol (3.33 L). After heating to 70 °C, the mixture was treated with 48% aqueous HBr (97 ml, 850.8 mmol) and stirred at 70 °C for 30 min. The resulting orange-red solution was treated with ethyl acetate (3.33 L) maintaining the temperature above 60 °C. The mixture was slowly cooled to rt over 18 h. The mixture was cooled to 0 °C over 1 h and stirred at that temperature for 5.5 h. The resulting precipitate was filtered, washed twice with ethyl acetate (1.39 L), and dried under vacuum to give the title compound as an off white solid (515 g, 97% yield).

Recrystallization of Polymorph A: 4-((3′-(((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3- yl)methyl)carbamoyl)-5′-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4′-methyl-[l,l’-biphenyl]-4- yl)methyl)morpholin-4-ium bromide (0.50 g, 0.77 mmol; 95.6% pure by HPLC) was suspended in ethanol (3.0 mL) and heated to 80 °C until a clear solution was obtained. To the solution was added MTBE (5.0 mL) slowly. The resulting solution was allowed to cool to 18-22 °C over 3 h and stirred at 18-22 °C for 15 h. The precipitate was filtered, washed twice with MTBE (2 mL) and dried under vacuum to give 0.45 g of the title compound (89% recovery, 96.6% pure by HPLC).

Compound I is protonated at the nitrogen of the morpholino substituent, providing a monohydrobromide of Compound I having the following structure:

This particular monohydrobromide can be referred to as “4-((3′-(((4,6-dimethyl-2-oxo- l,2-dihydropyridin-3-yl)methyl)carbamoyl)-5′-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4′- methyl-[l, -biphenyl]-4-yl)methyl)morpholin-4-ium bromide.” Figure 11 depicts the X-ray crystal structure of this particular salt form.

…………………………………………………………..

see

WO-2015057859

Eisai Research Institute; Epizyme Inc

Novel crystalline polymorphic form C of tazemetostat, useful for treating an EZH2-mediated cancer, including non-Hodgkin’s lymphoma and breast cancer.

…………………

Synthesis

Trade Names

Country	Trade Name	Vendor	Annotation
USA	Tazverik	Epizyme, 2020

Formulations

oral tabs. and suspension

References

- Knutson, S. K. et al., Proc. Natl. Acad. Sci USA, (2013) 110(19), 7922-7927.
- WO 2012 142504 (Epizyme/Eisai Co; 18.10.2012; appl. 13.4.2012; USA-prior. 13.4.2011).
- WO 2013 155317 (Epizyme/Eisai Co; 17.10.2013; appl. 11.4.2013).
- WO 2015 057859 (Epizyme/Eisai Co; 23.4.2015; appl. 15.10.2014; USA-prior. 16.10.2013).

EZH2 inhibitors for treating lymphona:
- WO 2015 195848 (Epizyme; 23.12.2015; appl. 17.6.2015; USA-prior. 17.6.2014).

////////

PAPER

RSC Advances (2015), 5(33), 25967-25978

http://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra02365c#!divAbstract

RSC Adv., 2015,5, 25967-25978,

DOI: 10.1039/C5RA02365C

The histone lysine methyltransferase EZH2 has been implicated as a key component in cancer aggressiveness, metastasis and poor prognosis. This study discovered a new class of hexahydroisoquinolin derivatives as EZH2 inhibitors. A structure–activity relationship study showed that the steric hindrance was important to the activity for EZH2. A preliminary optimization study led to the discovery of several potent compounds with low nanomolar to sub-nanomolar potency for EZH2. Biological evaluation indicated that SKLB1049 was a highly potent with improved solubility compared to EPZ6438, SAM-competitive, and cell-active EZH2 inhibitor that decreased global H3K27me3 in SU-DHL-6 and Pfeiffer lymphoma cells in a concentration- and time-dependent manner. Further study indicated that SKLB1049 caused cell arrest in G₀/G₁ phase. These compounds would be useful as chemical tools to further explore the biology of EZH2 and provided us with a start point to develop new EZH2 inhibitors.

Graphical abstract: Design, synthesis and biological evaluation of novel 1-methyl-3-oxo-2,3,5,6,7,8-hexahydroisoquinolins as potential EZH2 inhibitors

In vitro protocol:	Proc Natl Acad Sci U S A. 2013 May 7;110(19):7922-7.
In vivo protocol:	Proc Natl Acad Sci U S A. 2013 May 7;110(19):7922-7.

References

1: Knutson SK, Warholic NM, Johnston LD, Klaus CR, Wigle TJ, Iwanowicz D, Littlefield BA, Porter-Scott M, Smith JJ, Moyer MP, Copeland RA, Pollock RM, Kuntz KW, Raimondi A, Keilhack H. Synergistic Anti-Tumor Activity of EZH2 Inhibitors and Glucocorticoid Receptor Agonists in Models of Germinal Center Non-Hodgkin Lymphomas. PLoS One. 2014 Dec 10;9(12):e111840. doi: 10.1371/journal.pone.0111840. eCollection 2014. PubMed PMID: 25493630; PubMed Central PMCID: PMC4262195.

2: Knutson SK, Kawano S, Minoshima Y, Warholic NM, Huang KC, Xiao Y, Kadowaki T, Uesugi M, Kuznetsov G, Kumar N, Wigle TJ, Klaus CR, Allain CJ, Raimondi A, Waters NJ, Smith JJ, Porter-Scott M, Chesworth R, Moyer MP, Copeland RA, Richon VM, Uenaka T, Pollock RM, Kuntz KW, Yokoi A, Keilhack H. Selective inhibition of EZH2 by EPZ-6438 leads to potent antitumor activity in EZH2-mutant non-Hodgkin lymphoma. Mol Cancer Ther. 2014 Apr;13(4):842-54. doi: 10.1158/1535-7163.MCT-13-0773. Epub 2014 Feb 21. PubMed PMID: 24563539

3. Inhibitors of human histone methyltransferase EZH2, and methods of use thereof for treating cancer. By Kuntz, Kevin W.; Knutson, Sarah K.; Wigle, Timothy James Nelson . From U.S. Pat. Appl. Publ. (2013), US 20130040906 A1 20130214.

4. Aryl-or heteroaryl-substituted benzamide compounds as anticancer agents and their preparation By Kuntz, Kevin Wayne; Chesworth, Richard; Duncan, Kenneth William; Keilhack, Heike; Warholic, Natalie; Klaus, Christine; Zheng, Wanjun; Seki, Masashi; Shirotori, Syuji; Kawano, Satoshi From PCT Int. Appl. (2012), WO 2012142504 A1 20121018.

5: Knutson SK, Warholic NM, Wigle TJ, Klaus CR, Allain CJ, Raimondi A, Porter Scott M, Chesworth R, Moyer MP, Copeland RA, Richon VM, Pollock RM, Kuntz KW, Keilhack H. Durable tumor regression in genetically altered malignant rhabdoid tumors by inhibition of methyltransferase EZH2. Proc Natl Acad Sci U S A. 2013 May 7;110(19):7922-7. doi: 10.1073/pnas.1303800110. Epub 2013 Apr 25. PubMed PMID: 23620515; PubMed Central PMCID: PMC3651445.

WO2013155317A1 *	Apr 11, 2013	Oct 17, 2013	Epizyme, Inc.	Salt form of a human hi stone methyltransf erase ezh2 inhibitor
WO2013155464A1 *	Apr 12, 2013	Oct 17, 2013	Epizyme, Inc.	Combination therapy for treating cancer
WO2014049488A1 *	Sep 16, 2013	Apr 3, 2014	Pfizer Inc.	Benzamide and heterobenzamide compounds
WO2014062732A1 *	Oct 15, 2013	Apr 24, 2014	Epizyme, Inc.	Substituted benzene compounds
WO2014062733A2 *	Oct 15, 2013	Apr 24, 2014	Epizyme, Inc.	Substituted benzene compounds
WO2014172044A1 *	Mar 14, 2014	Oct 23, 2014	Epizyme, Inc.	Substituted benzene compounds
WO2015004618A1 *	Jul 9, 2014	Jan 15, 2015	Glaxosmithkline Intellectual Property (No.2) Limited	Enhancer of zeste homolog 2 inhibitors
WO2015010049A1 *	Jul 18, 2014	Jan 22, 2015	Epizyme, Inc.	Substituted benzene compounds
WO2015010078A2	Jul 18, 2014	Jan 22, 2015	Epizyme, Inc.	Substituted 6,5-fused bicyclic heteroaryl compounds

Citing Patent	Filing date	Publication date	Applicant	Title
WO2011140325A1 *	May 5, 2011	Nov 10, 2011	Glaxosmithkline Llc	Indazoles
WO2012142504A1 *	Apr 13, 2012	Oct 18, 2012	Eisai Co., Ltd.	Aryl-or heteroaryl-substituted benzene compounds
WO2014062720A2 *	Oct 15, 2013	Apr 24, 2014	Epizyme, Inc.	Methods of treating cancer

WO2011140324A1 *	May 5, 2011	Nov 10, 2011	Glaxosmithkline Llc	Indoles
WO2011140325A1 *	May 5, 2011	Nov 10, 2011	Glaxosmithkline Llc	Indazoles
WO2012005805A1 *	May 5, 2011	Jan 12, 2012	Glaxosmithkline Llc	Azaindazoles
US4522811	Jul 8, 1982	Jun 11, 1985	Syntex (U.S.A.) Inc.	Serial injection of muramyldipeptides and liposomes enhances the anti-infective activity of muramyldipeptides
US5763263	Jul 24, 1996	Jun 9, 1998	Dehlinger; Peter J.	Method and apparatus for producing position addressable combinatorial libraries
US7563589	May 27, 2005	Jul 21, 2009	The University Of North Carolina At Chapel Hill	Including EED, EZH2 and SUZ12 wherein the reconstituted complex has histone methyltransferase (HMTase) activity for lysine 27 of histone H3 (H3-K27); cancer

References

^ Jump up to:^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r “FDA approves first treatment option specifically for patients with epithelioid sarcoma, a rare soft tissue cancer”. U.S. Food and Drug Administration (FDA) (Press release). 23 January 2020. Retrieved 23 January 2020. This article incorporates text from this source, which is in the public domain.
^ Lue JK, Amengual JE (October 2018). “Emerging EZH2 Inhibitors and Their Application in Lymphoma”. Curr Hematol Malig Rep. 13 (5): 369–382. doi:10.1007/s11899-018-0466-6. PMID 30112706. S2CID 52010283.
^ “Tazemetostat”. NCI Drug Dictionary. National Cancer Institute.
^ Jump up to:^a ^b ^c “Drug Trials Snapshots: Tazverik”. U.S. Food and Drug Administration (FDA). 23 January 2020. Retrieved 22 February 2020. This article incorporates text from this source, which is in the public domain.

External links

“Tazemetostat”. Drug Information Portal. U.S. National Library of Medicine.

Tazemetostat
Clinical data

Trade names	Tazverik
Other names	EPZ-6438
AHFS/Drugs.com	Monograph
MedlinePlus	a620018
License data	US DailyMed: Tazemetostat US FDA: Tazverik
Legal status
Legal status	US: ℞-only
Identifiers
IUPAC name [show]
CAS Number	1403254-99-8
PubChem CID	66558664
DrugBank	DB12887
ChemSpider	30208713
UNII	Q40W93WPE1
KEGG	D11485 D11444
ChEMBL	ChEMBL3414621
Chemical and physical data
Formula	C₃₄H₄₄N₄O₄
Molar mass	572.750 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES [hide] CCN(C1CCOCC1)C2=CC(=CC(=C2C)C(=O)NCC3=C(C=C(NC3=O)C)C)C4=CC=C(C=C4)CN5CCOCC5
InChI [hide] InChI=1S/C34H44N4O4/c1-5-38(29-10-14-41-15-11-29)32-20-28(27-8-6-26(7-9-27)22-37-12-16-42-17-13-37)19-30(25(32)4)33(39)35-21-31-23(2)18-24(3)36-34(31)40/h6-9,18-20,29H,5,10-17,21-22H2,1-4H3,(H,35,39)(H,36,40) Key:NSQSAUGJQHDYNO-UHFFFAOYSA-N

About EPZ-‐6438 Epizyme is developing EPZ-‐6438, a small molecule inhibitor of EZH2 created with our

proprietary product platform, for the treatment of non-‐Hodgkin lymphoma patients and patients with INI1-‐deficient solid tumors. In many human cancers, misregulated EZH2 enzyme activity results in misregulation of genes that control cell proliferation—without these control mechanisms, cancer cells are free to grow

About Epizyme, Inc.

Epizyme, Inc. is a clinical stage biopharmaceutical company creating novel epigenetic therapeutics for cancer patients.

Epizyme has built a proprietary product platform that the company uses to create small molecule inhibitors of a 96 member class of enzymes known as histone methyltransferases, or HMTs. HMTs are part of the system of gene regulation, referred

to as epigenetics, that controls gene expression. Genetic alterations can result in changes to

the activity of HMTs, making them oncogenic (cancer -‐causing). By focusing on the genetic drivers of cancers, Epizyme’s targeted science seeks to match the right medicines with the right patients.

Epizyme^®, Inc.
400 Technology Square, 4th Floor
Cambridge, MA 02139

Phone: (617) 229-5872
Fax: (617) 349-0707
contact@Epizyme.com

Victoria Richon, vice president of biological sciences, Epizyme Inc.

Jason Rhodes (left) has been appointed to president of Epizyme Inc.,

100 Technology Square

Central Square – The square – Cambridge, MA, United States

/////////TAZVERIK, EPIZYME, FDA 2020, APPROVALS 2020, Tazemetostat, EPZ-6438, EPZ 6438

Vibegron ビベグロン

October 6, 2014 7:30 am / Leave a comment

Chemical structure for Vibegron (USAN)

Vibegron, MK-4618, KRP 114V

update FDA APPROVED 12/23/2020, GEMTESA, To treat overactive bladder

UNII-M5TSE03W5U; M5TSE03W5U; D10433

1190389-15-1; cas no

Molecular Formula: C₂₆H₂₈N₄O₃ Molecular Weight: 444.52552

Merck Sharp & Dohme Corp. INNOVATOR

phase 2 for the treatment of overactive bladder

(6S)-N-[4-([(2S,5R)-5-[(R)-Hydroxy(phenyl)methyl]pyrrolidin-2-yl]methyl)phenyl]-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide

(6S)-N-[4-[[(2S,5R)-5-[(R)-hydroxy(phenyl)methyl]pyrrolidin-2-yl]methyl]phenyl]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide

Target-based Actions Beta 3 adrenoceptor agonist
Indications Overactive bladder; Urinary incontinence

UPDATE 2018/9/21 pmda Beova JAPAN 2018Kyorin Pharmaceutical, under license from Merck, is developing vibegron (phase II, September 2014) for the treating of overactive bladder. In July 2014, Merck has granted to Kyorin an exclusive license to develop, manufacture and commercialize vibegron in Japan.

MK-4618 is being developed in phase II clinical trials at Merck & Co. for the treatment of overactive bladder. The company had been developing the compound for the treatment of endocrine disorders and hypertension; however, recent progress reports are not available at present.

In 2014, Merck licensed the product to Kyorin for development and commercialization in Japan.

The function of the lower urinary tract is to store and periodically release urine. This requires the orchestration of storage and micturition reflexes which involve a variety of afferent and efferent neural pathways, leading to modulation of central and peripheral neuroeffector mechanisms, and resultant coordinated regulation of sympathetic and parasympathetic components of the autonomic nervous system as well as somatic motor pathways. These proximally regulate the contractile state of bladder (detrusor) and urethral smooth muscle, and urethral sphincter striated muscle.

β Adrenergic receptors (βAR) are present in detrusor smooth muscle of various species, including human, rat, guinea pig, rabbit, ferret, dog, cat, pig and non-human primate. However, pharmacological studies indicate there are marked species differences in the receptor subtypes mediating relaxation of the isolated detrusor; β1AR predominate in cats and guinea pig, β2AR predominate in rabbit, and β3AR contribute or predominate in dog, rat, ferret, pig, cynomolgus and human detrusor. Expression of βAR subtypes in the human and rat detrusor has been examined by a variety of techniques, and the presence of β3AR was confirmed using in situ hybridization and/or reverse transcription-polymerase chain reaction (RT-PCR). Real time quantitative PCR analyses of β1AR, β2AR and β3AR mRNAs in bladder tissue from patients undergoing radical cystectomy revealed a preponderance of β3AR mRNA (97%, cf 1.5% for β1AR mRNA and 1.4% for β2AR mRNA). Moreover, β3AR mRNA expression was equivalent in control and obstructed human bladders. These data suggest that bladder outlet obstruction does not result in downregulation of β3AR, or in alteration of β3AR-mediated detrusor relaxation. β3AR responsiveness also has been compared in bladder strips obtained during cystectomy or enterocystoplasty from patients judged to have normal bladder function, and from patients with detrusor hyporeflexia or hyperreflexia. No differences in the extent or potency of β3AR agonist mediated relaxation were observed, consistent with the concept that the β3AR activation is an effective way of relaxing the detrusor in normal and pathogenic states.

Functional evidence in support of an important role for the β3AR in urine storage emanates from studies in vivo. Following intravenous administration to rats, the rodent selective β3AR agonist CL316243 reduces bladder pressure and in cystomeric studies increases bladder capacity leading to prolongation of micturition interval without increasing residual urine volume.

Overactive bladder is characterized by the symptoms of urinary urgency, with or without urgency urinary incontinence, usually associated with frequency and nocturia. The prevalence of OAB in the United States and Europe has been estimated at 16 to 17% in both women and men over the age of 18 years. Overactive bladder is most often classified as idiopathic, but can also be secondary to neurological condition, bladder outlet obstruction, and other causes. From a pathophysiologic perspective, the overactive bladder symptom complex, especially when associated with urge incontinence, is suggestive of detrusor overactivity. Urgency with or without incontinence has been shown to negatively impact both social and medical well-being, and represents a significant burden in terms of annual direct and indirect healthcare expenditures. Importantly, current medical therapy for urgency (with or without incontinence) is suboptimal, as many patients either do not demonstrate an adequate response to current treatments, and/or are unable to tolerate current treatments (for example, dry mouth associated with anticholinergic therapy). Therefore, there is need for new, well-tolerated therapies that effectively treat urinary frequency, urgency and incontinence, either as monotherapy or in combination with available therapies. Agents that relax bladder smooth muscle, such as β3AR agonists, are expected to be effective for treating such urinary disorders.

PATENT

http://www.google.com/patents/WO2013062881A1?cl=en

Figure imgf000013_0001

EXAMPLE 3

To a three neck flask equipped with a N₂ inlet, a thermo couple probe was charged pyrrolidine i-11 (10.0 g), sodium salt i-12 (7.87 g), followed by IPA (40 mL) and water (24 mL). 5 N HC1 (14.9 mL) was then slowly added over a period of 20 min to adjust pH = 3.3- 3.5, maintaining the batch temperature below 35 °C. Solid EDC hydrochloride (7.47 g) was charged in portions over 30 min. The reaction mixture was aged at RT for additional 0.5 – 1 h, aqueous ammonia (14%) was added dropwise to pH ~8.6. The batch was seeded and aged for additional 1 h to form a slurry bed. The rest aqueous ammonia (14%, 53.2 ml total) was added dropwise over 6 h. The resulting thick slurry was aged 2-3 h before filtration. The wet-cake was displacement washed with 30% IPA (30 mL), followed by 15% IPA (2 x 20mL) and water (2 X 20mL). The cake was suction dried under N₂ overnight to afford 14.3 g of compound of Formula (I)-

1H NMR (DMSO) δ 10.40 (s, NH), 7.92 (d, J = 6.8, 1H), 7.50 (m, 2H), 7.32 (m, 2H), 7.29 (m, 2H), 7.21 (m, 1H), 7.16 (m, 2H), 6.24 (d, J = 6.8, 1H), 5.13 (dd, J = 9.6, 3.1, 1H), 5.08 (br s, OH), 4.22 (d, J = 7.2, 1H), 3.19 (p, J = 7.0, 1H), 3.16-3.01 (m, 3H), 2.65 (m, 1H), 2.59-2.49 (m, 2H), 2.45 (br s, NH), 2.16 (ddt, J = 13.0, 9.6, 3.1, 1H), 1.58 (m, 1H), 1.39 (m, 1H), 1.31-1.24 (m, 2H).

¹³C NMR (DMSO) δ 167.52, 165.85, 159.83, 154.56, 144.19, 136.48, 135.66, 129.16, 127.71, 126.78, 126.62, 119.07, 112.00, 76.71, 64.34, 61.05, 59.60, 42.22, 31.26, 30.12, 27.09, 23.82.

HPLC method – For monitoring conversion

Column: XBridge C18 cm 15 cm x 4.6 mm, 3.5 μιη particle size;

Column Temp. : 35 °C; Flow rate: 1.5 mL/min; Detection: 220 nm;

Mobile phase: A. 5 mM Na₂B40₇.10 H20 B: Acetonitrile

Gradient:

HPLC method – For level of amide epimer detection

Column: Chiralpak AD-H 5 μηι, 250 mm x 4.6 mm.

Column Temp: 35 °C; Flow rate: 1.0 mL/min; Detection: 250 nm;

Mobile phase: Isocratic 30% Ethanol in hexanes + 0.1% isobutylamine

PATENT

WO 2009124167

http://www.google.com/patents/WO2009124167A1?cl=en

EXAMPLE 103

(6y)-N-r4-({(^‘25′. 5R)-5-r(^‘R)-hvdroxy(^‘phenvnmethyl1pyrrolidin-2-yl}methvnphenyl1-4-oxo- 4,6J,8-tetrahydropyiτolori,2-α1pyrimidine-6-carboxamide

ter?-butyl(2R. 55^f)-2-rCR)-hvdroxy(^‘phenvnmethyl1-5-r4-(^‘{r(^‘65^f)-4-oxo-4.6.7.8-

tetrahydropyrrolof 1.2-alpyrimidin-6- yl]carbonyl} amino)benzyl]pyrrolidine- 1 – carboxylate

To a solution of i-13a (21.4 g, 55.9 mmol) in N,N-dimethylformamide (100 ml) at O⁰C was added [(65)-4-oxo-4,6,7,8-tetrahydropyrrolo[l,2-α]pyrimidine-6-carboxylic acid (11.1 g, 61.5 mmol), followed by 1 -hydroxybenzotriazole (i-44, 7.55 g, 55.9 mmol), N-(3- dimethylaminopropyl)-N^l-ethylcarbodiimide hydrochloride (16.1 g, 84.0 mmol) and N,N- diisopropylethylamine (29.2 ml, 168 mmol). The reaction mixture was stirred from O⁰C to ambient temperature for 2 h. Water (600 ml) was added and it was extracted with dichloromethane (600 ml x 2). The combined organic layers were dried over Na₂SO₄. After removal of the volatiles, the residue was purified by using a Biotage Horizon® system (0-5% then 5% methanol with 10% ammonia/dichloromethane mixture) to afford the title compound which contained 8% of the minor diastereomer. It was further purified by supercritical fluid chromatography (chiral AS column, 40% methanol) to afford the title compound as a pale yellow solid (22.0 g, 72%). ¹H NMR (CDCl₃): δ 9.61 (s, IH), 7.93 (d, J = 6.6 Hz, IH), 7.49 (d, J = 8.4 Hz, 2H), 7.35-7.28 (m, 5H), 7.13 (d, J = 8.5 Hz, 2H), 6.40 (d, J = 6.7 Hz, IH), 5.36 (d, J = 8.6 Hz, IH), 4.38 (m, IH), 4.12-4.04 (m, 2H), 3.46 (m,lH), 3.15-3.06 (m, 2H), 2.91 (dd, J = 13.1, 9.0 Hz, IH), 2.55 (m, IH), 2.38 (m, IH), 1.71-1.49 (m, 13H). LC-MS 567.4 (M+23).

(6S)-N-\4-( U2S. 5R)-5-r(R)-hvdroxy(phenyl)methyl1pyrrolidin-2-

yl}methyl)phenyl1-4-oxo-4,6J,8-tetrahvdropyrrolori,2-α1pyrimidine-6- carboxamide

To a solution of the intermediate from Step A (2.50 g, 4.59 mmol) in dichloromethane (40 ml) was added trifluoroacetic acid (15 ml). The reaction mixture was stirred at ambient temperature for 1.5 h. After removal of the volatiles, saturated NaHCCh was added to make the PH value to 8-9. The mixture was then extracted with dichloromethane. The combined organic layers were dried over Na₂SO₄. After concentration, crystallization from methanol/acetonitrile afforded the title compound as a white solid (1.23g, 60%). ¹H NMR (DMSO-Cl₆): δ 10.40 (s, IH), 7.91 (d, J = 6.7 Hz, IH), 7.49 (d, J = 8.3 Hz, 2H), 7.32-7.26 (m, 4H), 7.21 (m, IH), 7.15 (d, J = 8.4 Hz, 2H), 6.23 (d, J = 6.7 Hz, IH), 5.11 (dd, J = 9.6, 2.9 Hz, IH), 5.10 (br, IH), 4.21 (d, J = 7.1 Hz, IH), 3.20-3.00 (m, 4H), 2.66-2.51 (m, 3H), 2.16 (m, IH), 1.57 (m, IH), 1.38 (m, IH), 1.29-1.23 (m, 2H). LC-MS 445.3 (M+l).

Using the Biological Assays described above, the human β3 functional activity of Example 103 was determined to be between 11 to 100 nM.

PATENT

CHECK STRUCTURE…………….CAUTION

http://www.google.com/patents/US8247415

Figure US08247415-20120821-C00547

Figure US08247415-20120821-C00015

CAUTION…………….

Example 103(6S)-N-[4-({(2S,5R)-5-[(R)-hydroxy(phenyl)methyl]pyrrolidin-2-yl}methyl)phenyl]-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-α]pyrimidine-6-carboxamide

Step A: tert-butyl(2R,5S)-2-[(R)-hydroxy(phenyl)methyl]-5-[4-({[(6S)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-α]pyrimidin-6-yl]carbonyl}amino)benzyl]pyrrolidine-1-carboxylate

To a solution of i-13a (21.4 g, 55.9 mmol) in N,N-dimethylformamide (100 ml) at 0° C. was added [(6S)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-α]pyrimidine-6-carboxylic acid (11.1 g, 61.5 mmol), followed by 1-hydroxybenzotriazole (i-44, 7.55 g, 55.9 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (16.1 g, 84.0 mmol) and N,N-diisopropylethylamine (29.2 ml, 168 mmol). The reaction mixture was stirred from 0° C. to ambient temperature for 2 h. Water (600 ml) was added and it was extracted with dichloromethane (600 ml×2). The combined organic layers were dried over Na₂SO₄. After removal of the volatiles, the residue was purified by using a Biotage Horizon® system (0-5% then 5% methanol with 10% ammonia/dichloromethane mixture) to afford the title compound which contained 8% of the minor diastereomer. It was further purified by supercritical fluid chromatography (chiral AS column, 40% methanol) to afford the title compound as a pale yellow solid (22.0 g, 72%). ¹H NMR (CDCl₃): δ 9.61 (s, 1H), 7.93 (d, J=6.6 Hz, 1H), 7.49 (d, J=8.4 Hz, 2H), 7.35-7.28 (m, 5H), 7.13 (d, J=8.5 Hz, 2H), 6.40 (d, J=6.7 Hz, 1H), 5.36 (d, J=8.6 Hz, 1H), 4.38 (m, 1H), 4.12-4.04 (m, 2H), 3.46 (m, 1H), 3.15-3.06 (m, 2H), 2.91 (dd, J=13.1, 9.0 Hz, 1H), 2.55 (m, 1H), 2.38 (m, 1H), 1.71-1.49 (m, 13H). LC-MS 567.4 (M+23).

Step B: (6S)-N-[4-({(2S,5R)-5-[(R)-hydroxy(phenyl)methyl]pyrrolidin-2-yl}methyl)phenyl]-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-α]pyrimidine-6-carboxamide

To a solution of the intermediate from Step A (2.50 g, 4.59 mmol) in dichloromethane (40 ml) was added trifluoroacetic acid (15 ml). The reaction mixture was stirred at ambient temperature for 1.5 h. After removal of the volatiles, saturated NaHCO₃was added to make the PH value to 8-9. The mixture was then extracted with dichloromethane. The combined organic layers were dried over Na₂SO₄. After concentration, crystallization from methanol/acetonitrile afforded the title compound as a white solid (1.23 g, 60%). ¹H NMR (DMSO-d₆): δ 10.40 (s, 1H), 7.91 (d, J=6.7 Hz, 1H), 7.49 (d, J=8.3 Hz, 2H), 7.32-7.26 (m, 4H), 7.21 (m, 1H), 7.15 (d, J=8.4 Hz, 2H), 6.23 (d, J=6.7 Hz, 1H), 5.11 (dd, J=9.6, 2.9 Hz, 1H), 5.10 (br, 1H), 4.21 (d, J=7.1 Hz, 1H), 3.20-3.00 (m, 4H), 2.66-2.51 (m, 3H), 2.16 (m, 1H), 1.57 (m, 1H), 1.38 (m, 1H), 1.29-1.23 (m, 2H). LC-MS 445.3 (M+1).

Using the Biological Assays described above, the human β3 functional activity of Example 103 was determined to be between 11 to 100 nM.

PATENT

WO2014150639

http://patentscope.wipo.int/search/en/detail.jsf?docId=WO2014150639&recNum=4&docAn=US2014023858&queryString=EN_ALL:nmr%20AND%20PA:merck&maxRec=11148

Step 6. Preparation of Compound 1-7 from Compound 1-6 and Compound A-2

To a three neck flask equipped with a N₂ inlet, a thermo couple probe was charged pyrrolidine hemihydrate 1-6 (10.3 g), sodium salt A-2 (7.87 g), followed by IPA (40 mL) and water (24 mL). 5 N HC1 (14.9 mL) was then slowly added over a period of 20 minutes to adjust pH = 3.3-3.5, maintaining the batch temperature below 35°C. Solid EDC hydrochloride (7.47 g) was charged in portions over 30 minutes. The reaction mixture was aged at RT for additional 0.5 – 1 hour, aqueous ammonia (14%) was added dropwise to pH -8.6. The batch was seeded and aged for additional 1 hour to form a slurry bed. The rest aqueous ammonia (14%, 53.2 ml total) was added dropwise over 6 hours. The resulting thick slurry was aged 2-3 hours before filtration. The wet-cake was displacement washed with 30% IPA (30 mL), followed by 15% IPA (2 x 20mL) and water (2 X 20mL). The cake was suction dried under N₂ overnight to afford 14.3 g of compound 1-7.

¹³C NMR (DMSO) δ 167.52, 165.85, 159.83, 154.56, 144.19, 136.48, 135.66, 129.16, 127.71, 126.78, 126.62, 119.07, 112.00, 76.71, 64.34, 61.05, 59.60, 42.22, 31.26, 30.12, 27.09, 23.82.

The crystalline freebase anhydrous form I of Compound 1-7 can be characterized by XRPD by

PATENT

WO-2014150633
Merck Sharp & Dohme Corp
Process for preparing stable immobilized ketoreductase comprises bonding of recombinant ketoreductase to the resin in a solvent. Useful for synthesis of vibegron intermediates. For a concurrent filling see WO2014150639, claiming the method for immobilization of ketoreductase. Picks up from WO2013062881, claiming the non enzymatic synthesis of vibegron and intermediates.

PAPER

Discovery of Vibegron: A Potent and Selective β₃ Adrenergic Receptor Agonist for the Treatment of Overactive Bladder

Scott D. Edmondson^*,

Merck Research Laboratories, 2015 Galloping Hill Road, PO Box 539, Kenilworth, New Jersey 07033, United States

J. Med. Chem., Article ASAP

DOI: 10.1021/acs.jmedchem.5b01372

Publication Date (Web): December 27, 2015

*Telephone: (908) 740-0287. E-mail scott.edmondson@merck.com.

http://pubs.acs.org/doi/abs/10.1021/acs.jmedchem.5b01372

http://pubs.acs.org/doi/suppl/10.1021/acs.jmedchem.5b01372/suppl_file/jm5b01372_si_001.pdf

The discovery of vibegron, a potent and selective human β₃-AR agonist for the treatment of overactive bladder (OAB), is described. An early-generation clinical β₃-AR agonist MK-0634 (3) exhibited efficacy in humans for the treatment of OAB, but development was discontinued due to unacceptable structure-based toxicity in preclinical species. Optimization of a series of second-generation pyrrolidine-derived β₃-AR agonists included reducing the risk for phospholipidosis, the risk of formation of disproportionate human metabolites, and the risk of formation of high levels of circulating metabolites in preclinical species. These efforts resulted in the discovery of vibegron, which possesses improved druglike properties and an overall superior preclinical profile compared to MK-0634. Structure–activity relationships leading to the discovery of vibegron and a summary of its preclinical profile are described.

Reference
1		H.P. Kaiser, et al., “Catalytic Hydrogenation of Pyrroles at Atmospheric Pressure“, J. Org. Chem., vol. 49, No. 22, p. 4203-4209 (1984).

A study of the efficacy and safety of MK-4618 in patients with overactive bladder (OAB) (MK-4618-008 EXT1) (NCT01314872)
ClinicalTrials.gov Web Site 2011, April 28

WO2011043942A1 *	Sep 27, 2010	Apr 14, 2011	Merck Sharp & Dohme Corp.	Combination therapy using a beta 3 adrenergic receptor agonist and an antimuscarinic agent
US20090253705 *	Apr 2, 2009	Oct 8, 2009	Richard Berger	Hydroxymethyl pyrrolidines as beta 3 adrenergic receptor agonists
US20110028481 *	Apr 2, 2009	Feb 3, 2011	Richard Berger	Hydroxymethyl pyrrolidines as beta 3 adrenergic receptor agonists

Citing Patent	Filing date	Publication date	Applicant	Title
US8642661	Aug 2, 2011	Feb 4, 2014	Altherx, Inc.	Pharmaceutical combinations of beta-3 adrenergic receptor agonists and muscarinic receptor antagonists
US8653260	Jun 20, 2012	Feb 18, 2014	Merck Sharp & Dohme Corp.	Hydroxymethyl pyrrolidines as beta 3 adrenergic receptor agonists
US20120202819 *	Sep 27, 2010	Aug 9, 2012	Merck Sharp & Dohme Corporation	Combination therapy using a beta 3 adrenergic receptor agonists and an antimuscarinic agent

US20020028835	Jul 12, 2001	Mar 7, 2002	Baihua Hu	Cyclic amine phenyl beta-3 adrenergic receptor agonists
US20070185136	Feb 2, 2007	Aug 9, 2007	Sanofi-Aventis	Sulphonamide derivatives, their preparation and their therapeutic application
US20110028481	Apr 2, 2009	Feb 3, 2011	Richard Berger	Hydroxymethyl pyrrolidines as beta 3 adrenergic receptor agonists
WO2003072572A1	Feb 17, 2003	Sep 4, 2003	Jennifer Anne Lafontaine	Beta3-adrenergic receptor agonists


US8247415	8-22-2012	Hydroxymethyl pyrrolidines as [beta]3 adrenergic receptor agonists

////////////C1CC(NC1CC2=CC=C(C=C2)NC(=O)C3CCC4=NC=CC(=O)N34)C(C5=CC=CC=C5)O

	shivkr2 on SPSR Excellence Award 2025 – S…
	Bonkasaurus on Infigratinib phosphate
	PALOVAROTENE \| ORGAN… on Palovarotene
	Pfizer just purchase… on Temanogrel
	Pfizer To Cash In On… on Temanogrel

Tag Archives: 2020 APPROVALS

SEARCH THIS BLOG

Blog Stats

Flag and hits

Follow Blog via Email

Pages

Archives

Categories

Recent Posts

ORGANIC SPECTROSCOPY

SUBSCRIBE

Follow Blog via Email

Verified Services

Pages

Archives

Categories

Recent Comments

SEARCH THIS BLOG

History

References

Further reading

External links

Share this:

History

External links

Share this:

Mechanism of action

Clinical trials and approval

Phase 1 study

Phase 2 study: Proof of concept (2011)

DARWIN 1 trial

DARWIN 2 trial

DARWIN 3 trial

Time line

WO 2017012773

References

Share this:

History

Synthesis

Trade Names

Formulations

References

EZH2 inhibitors for treating lymphona:

References

External links

Share this:

PATENT

PATENT

PATENT

CAUTION…………….

PATENT

PATENT

PAPER

Discovery of Vibegron: A Potent and Selective β3 Adrenergic Receptor Agonist for the Treatment of Overactive Bladder

Share this:

Post navigation

SEARCH THIS BLOG

FLAGS AND HITS

Follow Blog via Email

Discovery of Vibegron: A Potent and Selective β₃ Adrenergic Receptor Agonist for the Treatment of Overactive Bladder