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GSK-2816126

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STR1

GSK-2816126

N-[(1,2-Dihydro-4,6-dimethyl-2-oxo-3-pyridinyl)methyl]-3-methyl-1-[(1S)-1-methylpropyl]-6-[6-(1-piperazinyl)-3-pyridinyl]-1H-indole-4-carboxamide, GSK 126, GSK 2816126, GSK 2816126A

N-[(4,6-Dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-3-methyl-1-((1S)-1-methylpropyl)-6-[6-(1-piperazinyl)-3-pyridinyl]-1H-indole-4-carboxamide

Phase I

Formula
C31H38N6O2
Formula Wt.
526.67

An histone-lysine n-methyltransferase EZH2 inhibitor potentially for the treatment of B-cell lymphoma.

Research Code GSK-2816126; GSK-126; 2816126

CAS No. 1346574-57-9

  • Originator GlaxoSmithKline
  • Class Antineoplastics
  • Mechanism of Action EZH2 enzyme inhibitors; Histone modulators
  • Phase I Diffuse large B cell lymphoma; Follicular lymphoma
  • Preclinical Acute myeloid leukaemia

Most Recent Events

  • 31 Mar 2014 Phase-I clinical trials in Follicular lymphoma (Second-line therapy or greater) in USA and United Kingdom (IV)
  • 31 Mar 2014 Phase-I clinical trials in Diffuse large B cell lymphoma (Second-line therapy or greater) in USA and United Kingdom (IV)
  • 16 Jan 2014 Preclinical trials in Diffuse large B cell lymphoma & Follicular lymphoma in United Kingdom (IV)

GSK-126 is an inhibitor of mutant EZH2, a histone methyltransferase (HMT) that exhibits point mutations at key residues Tyr641 and Ala677; this compound does not appreciably affect WT EZH2. EZH2 is responsible for modulating expression of a variety of genes. GSK-126 competes with cofactor S-adenylmethionine (SAM) for binding to EZH2. GSK-126 displays anticancer chemotherapeutic activity by inhibiting proliferation in in vitro and in vivo models of diffuse large B-cell lymphoma.

SYNTHESIS

STR1

STR1

PATENT

CN 105541801

https://www.google.com/patents/CN105541801A?cl=zh

Example 79: Add (S) in a three-necked flask 100 Qiu – bromo – Shu – (isobutyl) – N – ((4,6-dimethyl-2-oxo -l, 2- dihydropyridin-3-yl) methyl) -3-methyl-1 hydrogen – indole carboxamide (365mg, 0.82mmol), 2- (piperazin-1-yl) pyridine-5-boronic acid pinacol ester (309mg, 1.07mmol, 1 · 3eq), potassium phosphate (522mg, 2.46mmol, 3eq), water, and I, 4- diepoxy-hexadecane as the solvent. Then, under nitrogen was added [I, Γ- bis (diphenylphosphino) ferrocene] dichloropalladium (II) dichloromethane complex (53.9mg, 0.066mmo 1), and at 90 ° C reaction, to give the desired product after purification 400mg (92% yield). Goo NMR (500MHz, DMSO- (I6) JO.70-0 · 78 (ιή, 3H), 1.37-1.44 (m, 4H), 1.75-1.87 (m, 2H), 2.11 (s, 3H), 2.16 ( s, 3H), 2.22-2.27 (m, 3H), 2.77-2.85 (m, 4H), 3.41-3.49 (m, 4H), 4.35 (d, J = 5.31Hz, 2H), 4.56-4.68 (m, lH), 5.87 (s, 1H), 6.88 (d, J = 8.84Hz, 1H), 7.17 (d J = 1.52Hz, 1H), 7.26 (s, lH), 7.73 (d J = 1.26Hz, 1H) , 7.91 (dd, J = 8.84Hz, lH), 8.16 (t, J = 5.05Hz, lH), 8.50 (d, J = 2.53Hz, lH); 13C NMR (125MHz, DMSO- (I6) Sll .6 , 12.6,19.1, 19.9,21.7,30.4,35.9,46.3,46.9,52.4,107.6,108.2,108.5,110.6,116.9,122.6,123.8, 130.6,131.5,136.7,138.6,143.5,146.4,150.2,159.2,164.0 , 169.6.

PATENT

WO 2013067296

Examples 267 and 268

(S)-6-bromo-1 -(sec-butyl)-N-((4,6-dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methyl)-3- methyl-1 H-indole-4-carboxamide (Ex 267) and (R)-6-Bromo-1 -(sec-butyl)-N-((4,6- dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methyl)-3-methyl-1 H-indole-4-carboxamide (Ex 268)

Figure imgf000120_0001

6-Bromo-1-(sec-butyl)-N-((4,6-dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methy methyl-1 H-indole-4-carboxamide (racemic mixture, 1.9 g) was resolved by chiral HPLC (column : Chiralpak AD-H, 5 microns, 50 mm x 250 mm, UV detection :240 nM, flow rate: 100 mL/min, T = 20 deg C, eluent: 60:40:0.1 n-heptane:ethanol:isopropylamine

(isocratic)). For each run, 100 mg of the racemic compound was dissolved in 30 volumes (3.0 ml.) of warm ethanol with a few drops of isopropylamine added. A total of 19 runs were performed. Baseline resolution was observed for each run. The isomer that eluted at 8.3-10.1 min was collected (following concentration) as a white solid, which was dried at 50 °C (< 5 mm Hg) to afford 901 mg, and was determined to be the S isomer* (Ex. 267; chiral HPLC: >99.5% ee (no R isomer detected). The isomer that eluted at 10.8-13.0 min was collected as a white solid, which was dried at 50 °C (< 5 mm Hg) to afford 865 mg, and was determined to be the R isomer* (Ex. 268; chiral HPLC: 99.2% ee; 0.4% S isomer detected). 1H NMR and LCMS were consistent with the parent racemate.

* The absolute configuration was determined by an independent synthesis of each enantiomer from the corresponding commercially available homochiral alcohols via Mitsunobu reaction. The sterochemical assignments were also consistent by vibrational circular dichroism (VCD) analysis.

Example 269

1-(sec-butyl)-N-((4,6-dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methyl)-3-methyl-6-(6- (piperazin-1 -yl)pyridin-3-yl)-1 -indole-4-carboxamide

Figure imgf000120_0002

Added sequentially to a reaction vial were 6-bromo-1 -(sec-butyl)-N-((4,6-dimethyl- 2-OXO-1 , 2-dihydropyridin-3-yl)methyl)-3-methyl-1 H-indole-4-carboxamide (0.15 g, 0.338 mmol), 1-(5-(4,4,5,5-tetramethyl-1 ,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (0.127 g, 0.439 mmol), and potassium phosphate (tribasic) (0.287 g, 1.350 mmol), followed by 1 ,4- Dioxane (3 mL) and water (0.75 mL). The suspension was stirred under N2 degassing for 10 min., and then added PdCI2(dppf)-CH2CI2adduct (0.028 g, 0.034 mmol). The reaction vial was sealed, placed into a heat block at 95 °C, and stirred for 1.5 h. The contents were removed from heating and allowed to cool to room temperature. The aq layer was removed from bottom of the reaction vial via pipette. The reaction mixture was diluted into EtOAc (20 mL) followed by addition of 0.2 g each of Thiol-3 silicycle resin and silica gel. The volatiles were removed in vacuo and the residue dried on hi-vac for 1 h. The contents were purified by silica gel chromatography (dry loaded, eluent : A:

Dichloromethane, B: 10% (2M Ammonia in Methanol) in Chloroform, Gradient B: 8- 95%). The obtained solid was concentrated from TBME and dried in vacuum oven at 45 °C for 18 h. The product was collected as 129 mg (70%). 1H NMR (400 MHz, DMSO-d6) δ ppm 0.73 (t, J=7.33 Hz, 3H), 1.40 (d, J=6.57 Hz, 3H), 1.80 (dq, J=10.07, 7.08 Hz, 2H), 2.1 1 (s, 3H), 2.14 – 2.19 (m, 3H), 2.24 (s, 3H), 2.76 – 2.85 (m, 4H), 3.41 – 3.49 (m, 4H), 4.35 (d, J=5.05 Hz, 2H), 4.54 – 4.67 (m, 1 H), 5.87 (s, 1 H), 6.88 (d, J=8.84 Hz, 1 H), 7.17 (d, J=1.26 Hz, 1 H), 7.26 (s, 1 H), 7.73 (d, J=1.26 Hz, 1 H), 7.91 (dd, J=8.84, 2.53 Hz, 1 H), 8.16 (t, J=5.05 Hz, 1 H), 8.50 (d, J=2.53 Hz, 1 H), 1 1.48 (br. s.,1 H) ; LCMS MH+ =527.3.

Example 270

A/-[(4,6-dimethyl-2-oxo-1 ,2-dihydro-3-pyridinyl)methyl]-3-methyl-1 -[(1 S)-1 -methylpropyl]-6- [6-(1-piperazinyl)-3-pyridinyl]-1 H-indole-4-carboxamide

Figure imgf000121_0001

To a 30 mL microwave vial were added (S)-6-bromo-1 -(sec-butyl)-N-((4,6- dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methyl)-3-methyl-1 H-indole-4-carboxamide (100 mg, 0.225 mmol), 1 -(5-(4,4,5,5-tetramethyl-1 ,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (85 mg, 0.293 mmol), 1 ,2-Dimethoxyethane (DME) (3 mL), water (1.000 mL) and sodium carbonate (0.338 mL, 0.675 mmol), and the mixture was degassed for 5 min by bubbling nitrogen. PdCI2(dppf)-CH2CI2 adduct (14.70 mg, 0.018 mmol) was added and the tube was sealed. The mixture was irradiated (microwave) at 140 °C for 10 min. The mixture was concentrated and the residue was taken up into MeOH and filtered. The filtrate was purified using reverse-phase HPLC (eluent: 25%ACN/H20, 0.1 % NH4OH to 60%

ACN/H20, 0.1 % NH4OH ) to give 91 mg of product as off-white solid. 1 H NMR (400 MHz, DMSO-d6) δ ppm 0.70 – 0.78 (m, 3H), 1.37 – 1.44 (m, 3H), 1 .75 – 1.87 (m, 2H), 2.1 1 (s, 3H), 2.16 (s, 3H), 2.22 – 2.27 (m, 3H), 2.77 – 2.85 (m, 4H), 3.41 – 3.49 (m, 4H), 4.35 (d, J=5.31 Hz, 2H), 4.56 – 4.68 (m, 1 H), 5.87 (s, 1 H), 6.88 (d, J=8.84 Hz, 1 H), 7.17 (d, J=1.52 Hz, 1 H), 7.26 (s, 1 H), 7.73 (d, J=1.26 Hz, 1 H), 7.91 (dd, J=8.84, 2.53 Hz, 1 H), 8.16 (t, J=5.05 Hz, 1 H), 8.50 (d, J=2.53 Hz, 1 H); LCMS: 527.8 (MH+).

Example 271

A/-[(4,6-dimethyl-2-oxo-1 ,2-dihydro-3-pyridinyl)methyl]-3-methyl-1 -[(1 /?)-1-methylpropyl]- 6-[6-(1 -piperazinyl)-3-pyridinyl]-1 -indole-4-carboxamide

Figure imgf000122_0001

To a 30 mL microwave vial were added (R)-6-bromo-1-(sec-butyl)-N-((4,6- dimethyl-2-oxo-1 ,2-dihydropyridin-3-yl)methyl)-3-methyl-1 H-indole-4-carboxamide (100 mg, 0.225 mmol), 1 -(5-(4,4,5,5-tetramethyl-1 ,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (85 mg, 0.293 mmol), 1 ,2-Dimethoxyethane (DME) (3 mL), water (1.000 mL) and sodium carbonate (0.338 mL, 0.675 mmol), and the mixture was degassed for 5 min by bubbling nitrogen. PdCI2(dppf)-CH2Cl2 adduct (14.70 mg, 0.018 mmol) was added and the tube was sealed. The mixture was irradiated (microwave) at 140 °C for 10 min. The mixture was concentrated and the residue was taken up into MeOH and filtered. The filtrate was purified using reverse-phase HPLC (eluent: 25%ACN/H20, 0.1 % NH4OH to 60%

ACN/H20, 0.1 % NH4OH ) to give 90 mg of product as off-white solid. 1 H NMR (400 MHz, DMSO-d6) δ ppm 0.73 (m, 3H), 1.41 (d, J=6.57 Hz, 3H), 1.81 (td, J=7.14, 2.91 Hz, 2H), 2.1 1 (s, 3H), 2.15 – 2.20 (m, 3H), 2.24 (s, 3H), 2.77 – 2.83 (m, 4H), 3.41 – 3.49 (m, 4H), 4.35 (d, J=5.05 Hz, 2H), 4.54 – 4.68 (m, 1 H), 5.87 (s, 1 H), 6.88 (d, J=8.84 Hz, 1 H), 7.17 (d, J=1.52 Hz, 1 H), 7.26 (s, 1 H), 7.73 (d, J=1.26 Hz, 1 H), 7.91 (dd, J=8.84, 2.53 Hz, 1 H), 8.16 (t, J=5.05 Hz, 1 H), 8.50 (d, J=2.27 Hz, 1 H); LCMS: 527.7 (MH+)

PATENT

WO 2011140324

Example 270

N-[(4,6-dimethyl-2-oxo-l,2-dihydro-3-pyridinyl)methyl]-3-methyl-l-[(15)-l-methylpropyl]-6-[6-(l-piperazinyl)-3-pyridinyl]-lH-indole-4-carboxamide

To a 30 niL microwave vial were added (S)-6-bromo-l-(sec-butyl)-N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3-yl)methyl)-3 -methyl- lH-indole-4-carboxamide (100 mg, 0.225 mmol), l-(5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (85 mg, 0.293 mmol), 1 ,2-Dimethoxyethane (DME) (3 mL), water (1.000 mL) and sodium carbonate (0.338 mL, 0.675 mmol), and the mixture was degassed for 5 min by bubbling nitrogen. PdCi2(dppf)-CH2Ci2 adduct (14.70 mg, 0.018 mmol) was added and the tube was sealed. The mixture was irradiated (microwave) at 140 °C for 10 min. The mixture was concentrated and the residue was taken up into MeOH and filtered. The filtrate was purified using reverse-phase HPLC (eluent: 25%ACN/H20, 0.1% NH4OH to 60% ACN/H20, 0.1% NH4OH ) to give 91 mg of product as off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.70 – 0.78 (m, 3H), 1.37 – 1.44 (m, 3H), 1.75 – 1.87 (m, 2H), 2.11 (s, 3H), 2.16 (s, 3H), 2.22 – 2.27 (m, 3H), 2.77 – 2.85 (m, 4H), 3.41 – 3.49 (m, 4H), 4.35 (d, J=5.31 Hz, 2H), 4.56 – 4.68 (m, IH), 5.87 (s, IH), 6.88 (d, J=8.84 Hz, IH), 7.17 (d, J=1.52 Hz, IH), 7.26 (s, IH), 7.73 (d, J=1.26 Hz, IH), 7.91 (dd, J=8.84, 2.53 Hz, IH), 8.16 (t, J=5.05 Hz, IH), 8.50 (d, J=2.53 Hz, IH); LCMS: 527.8 (MH+).

Example 271

N-[(4,6-dimethyl-2-oxo-l,2-dihydro-3-pyridinyl)methyl]-3-methyl-l-[(li?)-l-methylpropyl]-6-[6-(l-piperazinyl)-3-pyridinyl]-l -indole-4-carboxamide

To a 30 mL microwave vial were added (R)-6-bromo-l-(sec-butyl)-N-((4,6-dimethyl-2-oxo-l,2-dihydropyridin-3-yl)methyl)-3 -methyl- lH-indole-4-carboxamide (100 mg, 0.225 mmol), l-(5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (85 mg, 0.293 mmol), 1 ,2-Dimethoxyethane (DME) (3 mL), water (1.000 mL) and sodium carbonate (0.338 mL, 0.675 mmol), and the mixture was degassed for 5 min by bubbling nitrogen. PdCl2(dppf)-CH2Cl2 adduct (14.70 mg, 0.018 mmol) was added and the tube was sealed. The mixture was irradiated (microwave) at 140 °C for 10 min. The mixture was concentrated and the residue was taken up into MeOH and filtered. The filtrate was purified using reverse-phase HPLC (eluent: 25%ACN/H20, 0.1% NH4OH to 60% ACN/H20, 0.1% NH4OH ) to give 90 mg of product as off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.73 (m, 3H), 1.41 (d, J=6.57 Hz, 3H), 1.81 (td, J=7.14, 2.91 Hz, 2H), 2.11 (s, 3H), 2.15 – 2.20 (m, 3H), 2.24 (s, 3H), 2.77 – 2.83 (m, 4H), 3.41 – 3.49 (m, 4H), 4.35 (d, J=5.05 Hz, 2H), 4.54 -4.68 (m, 1H), 5.87 (s, 1H), 6.88 (d, J=8.84 Hz, 1H), 7.17 (d, J=1.52 Hz, 1H), 7.26 (s, 1H), 7.73 (d, J=1.26 Hz, 1H), 7.91 (dd, J=8.84, 2.53 Hz, 1H), 8.16 (t, J=5.05 Hz, 1H), 8.50 (d, J=2.27 Hz, 1H); LCMS: 527.7 (MH+).

REF

Tian X, Zhang S, Liu HM, et al. Histone lysine-specific methyltransferases and demethylases in carcinogenesis: new targets for cancer therapy and prevention. Curr Cancer Drug Targets. 2013 Jun 10;13(5):558-79. PMID: 23713993.

McCabe MT, Ott HM, Ganji G, et al. EZH2 inhibition as a therapeutic strategy for lymphoma with EZH2-activating mutations. Nature. 2012 Dec 6;492(7427):108-12. PMID: 23051747.

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/////////GSK-2816126,  GSK-126,  2816126, 1346574-57-9, GSK 126, GSK 126, GSK 2816126, GSK 2816126A

CC=5C=C(C)NC(=O)C=5CNC(=O)c1cc(cc2c1c(C)cn2[C@@H](C)CC)c3cnc(cc3)N4CCNCC4


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DR ANTHONY CRASTO

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DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with GLENMARK PHARMACEUTICALS LTD, Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 29 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 29 year tenure till date Aug 2016, Around 30 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 9 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 25 Lakh plus views on dozen plus blogs, He makes himself available to all, contact him on +91 9323115463, email amcrasto@gmail.com, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 13 lakh plus views on New Drug Approvals Blog in 212 countries......https://newdrugapprovals.wordpress.com/ , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

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