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Imlunestrant

Example 1A

5-(4-{2-[3-(Fluoromethyl)azetidin-1-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[1]benzopyrano[4,3-c]quinolin-2-ol, Isomer 1Separate the two enantiomers of 5-(4-{2-[3-(fluoromethyl)azetidin-1-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[1]benzopyrano[4,3-c]quinolin-2-ol by chiral SFC with the following conditions: Column: LUX® Cellulose-1, 5×25 cm; eluting with a mobile phase of 30% iPrOH (with 0.5% DMEA) in CO ₂; column temperature: 40° C.; flow rate: 300 g/minute; UV detection wavelength: 270 nm to give Example 1A as the first eluting enantiomer (Isomer 1). ES/MS (m/z): 525.2 (M+H). Confirm enantiomeric enrichment of Isomer 1 by chiral analytical SFC, >99% ee, t _(R): 1.30 minutes; column: CHIRALCEL® OD-H, 4.6×150 mm; eluting with a mobile phase of 30% MeOH (0.2% IPA) in CO ₂; column temperature: 40° C.; flow rate: 5 mL/minute; UV detection wavelength: 225 nm. Isolate the title compound of Example 1B to give the second eluting enantiomer (Isomer 2). ES/MS (m/z): 525.2 (M+H). Confirm enantiomeric enrichment of Isomer 2 by chiral analytical SFC, 98% ee, t _(R): 2.03 minutes; column: CHIRALCEL® OD-H, 4.6×150 mm; eluting with a mobile phase of 30% MeOH (0.2% IPA) in CO ₂; column temperature: 40° C.; flow rate: 5 mL/minute; UV detection wavelength: 225 nm.

Alternate Preparation Example 1B

Crystalline 5-(4-{2-[3-(Fluoromethyl)azetidin-1-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[1]benzopyrano[4,3-c]quinolin-2-ol, Isomer 2

Stir 5-(4-{2-[3-(fluoromethyl)azetidin-1-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[1]benzopyrano[4,3-c]quinolin-2-ol, 4-methylbenzenesulfonic acid, Isomer 2 (23.8 g, 0.034 mol) in water (250 mL) at 1000 rpm. Add NaOH (76 μL) and stir the solution for 2 hours. Add DCM (600 mL). Separate the mixture, dry the DCM extract with magnesium sulfate, filter the material through a syringe filter (0.45 μm), and concentrate to dryness. Allow the material to sit under a N ₂stream over a weekend. Add 1:1 EtOH/water (80 mL) and stir the mixture with sonication. Collect a tan solid by filtration on a nylon membrane to give the title compound (10.47 g, 0.02 mol, 59%).

PAT

WO2020014435

https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2020014435&_cid=P12-MG7DHN-18354-1

EXAMPLE 1

Racemic 5-(4-{2-[3-(Fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H- [ 1 ]benzopyrano[4,3 -c]quinolin-2-ol

Cool a solution of (4-{2-[3-(fluoromethyl)azetidin-l-yl]ethoxy}phenyl){3-[2-fluoro-4-(trifluoromethyl)phenyl]-7-hydroxyquinolin-4-yl}methanone (5.27 g, 9.71 mmol) in 1,4-dioxane (100 mL) to 5 °C. Add lithium triethylborohydride (1 M in THF, 30.0 mL, 30.0 mmol). Remove the cooling bath and stir for 1.5 hours at room temperature. Quench the mixture with water. Add saturated NH₄Cl solution and EtOAc. Separate the layers and extract the aqueous layer with EtOAc. Combine the organic extracts, dry over anhydrous MgS0₄, filter, and concentrate the filtrate. Dissolve the crude residue in THF (100 mL).

Add sodium hydride (60% in mineral oil, 1.94 g, 48.5 mmol). Reflux the solution for 1.5 hours. Add additional sodium hydride (60% in mineral oil, 1.94 g, 48.5 mmol), then reflux for an additional 30 minutes. Cool the solution to room temperature and quench with water. Add EtOAc and saturated NH₄Cl solution. Separate the layers and extract the aqueous layer with EtOAc. Combine the organic extract, dry over anhydrous MgS0₄, filter, and concentrate the filtrate. Purify the residue by silica gel column chromatography eluting with a gradient of 5-7% MeOH in DCM to give the title compound (3.70 g, 72%) as a light yellow foam. ES/MS (m/z): 525.2 (M+H).

Prepare the following compounds in a manner essentially analogous to the method of Example 1, with the following variations in procedure. For the reduction, use 3 to 5 equivalents of lithium triethylborohydride with reaction times from 30 minutes to one hour and drying of the organic layers over magnesium sulfate or sodium sulfate. ETse the crude residue directly or purify by silica gel column chromatography eluting with a gradient of 0-5-7.5-10% MeOH in DCM before cyclization. Complete the cyclization by refluxing in THF for up to 16 hours, or in DMF, from 2 hours at room temperature for Ex 2, to 2 hours at 85 °C for Ex 8. Extract with DCM or EtOAc and dry organic layers over magnesium sulfate or sodium sulfate. Purify by silica gel column chromatography using up to 10% (MeOH or 7 M ammoniated MeOH) in DCM (Ex 2: gradient 0-10% MeOH in DCM; Ex 5: gradient 4-10% 7 M ammoniated MeOH in DCM; Ex 8: gradient 5-7.5% 7 M ammoniated MeOH in DCM) or by high pH reversed phase HPLC as noted.

EXAMPLE 1A

-(4-{2-[3-(Fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H- [l]benzopyrano[4,3-c]quinolin-2-ol, Isomer 1

and

EXAMPLE 1B

5-(4-{2-[3-(Fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H- [l]benzopyrano[4,3-c]quinolin-2-ol, Isomer 2

Separate the two enantiomers of 5-(4-{2-[3-(fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[l]benzopyrano[4,3-c]quinolin-2-ol by chiral SFC with the following conditions: Column: LUX® Cellulose-l, 5 x 25 cm; eluting with a mobile phase of 30% iPrOH (with 0.5% DMEA) in C0₂; column temperature: 40 °C; flow rate: 300 g/minute; UV detection wavelength: 270 nm to give Example 1 A as the first eluting enantiomer (Isomer 1). ES/MS (m/z): 525.2 (M+H). Confirm enantiomeric enrichment of Isomer 1 by chiral analytical SFC, >99% ee, /(R>: 1.30 minutes; column: CHFRALCEL® OD-H, 4.6 x 150 mm; eluting with a mobile phase of 30% MeOH (0.2% IP A) in C0₂; column temperature: 40 °C; flow rate: 5 mL/minute; UV detection wavelength: 225 nm. Isolate the title compound of Example 1B to give the second eluting enantiomer (Isomer 2). ES/MS (m/z): 525.2 (M+H). Confirm enantiomeric enrichment of Isomer 2 by chiral analytical SFC, 98% ee, /_(R>: 2.03 minutes; column: CHIRALCEL® OD-H, 4.6 x 150 mm; eluting with a mobile phase of 30% MeOH (0.2% IP A) in C0₂; column temperature: 40 °C; flow rate: 5 mL/minute; UV detection wavelength: 225 nm.

Alternate Preparation EXAMPLE 1B

Crystalline 5-(4-{2-[3-(Fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H- [l]benzopyrano[4,3-c]quinolin-2-ol, Isomer 2

Stir 5-(4-{2-[3-(fluoromethyl)azetidin-l-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[l]benzopyrano[4,3-c]quinolin-2-ol, 4-methylbenzenesulfonic acid, Isomer 2 (23.8 g, 0.034 mol) in water (250 mL) at 1000 rpm. Add NaOH (76 pL) and stir the solution for 2 hours. Add DCM (600 mL). Separate the mixture, dry the DCM extract with magnesium sulfate, filter the material through a syringe filter (0.45 pm), and concentrate to dryness. Allow the material to sit under a N₂ stream over a weekend. Add 1 : 1 EtOH/water (80 mL) and stir the mixture with sonication. Collect a tan solid by filtration on a nylon membrane to give the title compound (10.47 g, 0.02 mol, 59%).

PAT

Selective estrogen receptor degradersPublication Number: US-2023234960-A1Priority Date: 2018-07-12
Selective estrogen receptor degraderPublication Number: CN-112424205-BPriority Date: 2018-07-12Grant Date: 2023-10-31
selective estrogen receptor degraderPublication Number: CN-117379428-APriority Date: 2018-07-12
Selective estrogen receptor degradersPublication Number: US-11993608-B2Priority Date: 2018-07-12Grant Date: 2024-05-28
Selective estrogen receptor degradersPublication Number: US-12128040-B2Priority Date: 2018-07-12Grant Date: 2024-10-29

PAT

https://patents.google.com/patent/US11926634B2/en

Selective estrogen receptor degraders (SERDs) bind to the estrogen receptor (ER) and downregulate ER-mediated transcriptional activity. The degradation and downregulation caused by SERDs can be useful in the treatment of various proliferative immune mediated disorders, cell proliferation disorders, including cancers such as breast cancer, ovarian cancer, endometrial cancer, prostate cancer, uterine cancer, gastric cancer, and lung cancer as well as mutations due to emerging resistance. Some small molecule examples of SERDs have been disclosed in the literature (see, e.g., WO2005073204, WO2014205136, and WO2016097071). Nonetheless, there is a need for new SERDs to treat ER-positive cancers, such as breast cancer, gastric cancer, and/or lung cancer.

As described in U.S. Pat. No. 10,654,866 (the ‘866 patent) a series of SERDs of the following formula have been discovered, along with pharmaceutically acceptable salts thereof:

wherein one of R₁and R₂are independently Cl, F, —CF₃, or —CH₃, and the other is H.

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Clinical data

Trade names	Inluriyo
Other names	LY3484356, LY-3484356
AHFS/Drugs.com	Inluriyo
License data	US DailyMed: Imlunestrant
Routes of administration	By mouth
Drug class	Estrogen receptor antagonist
ATC code	None
Legal status
Legal status	US: ℞-only^[1]
Identifiers
IUPAC name
CAS Number	2408840-26-4as tosylate: 2408840-41-3
PubChem CID	146603228
DrugBank	DB19043
ChemSpider	115010421
UNII	9CXQ3PF69Uas tosylate: F7UDT90EW5
KEGG	D12216as tosylate: D12217
ChEMBL	ChEMBL5095183
Chemical and physical data
Formula	C₂₉H₂₄F₄N₂O₃
Molar mass	524.516 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES
InChI

References

https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/218881s000lbl.pdf
“FDA approves imlunestrant for ER-positive, HER2-negative, ESR1-mutated advanced or metastatic breast cancer”. U.S. Food and Drug Administration (FDA). 25 September 2025. Retrieved 27 September 2025. This article incorporates text from this source, which is in the public domain.
“U.S. FDA approves Inluriyo (imlunestrant) for adults with ER+, HER2-, ESR1-mutated advanced or metastatic breast cancer” (Press release). Eli Lilly. 25 September 2025. Retrieved 27 September 2025 – via PR Newswire.
World Health Organization (2022). “International nonproprietary names for pharmaceutical substances (INN): recommended INN: list 88”. WHO Drug Information. 36 (3). hdl:10665/363551.

External links

Clinical trial number NCT04975308 for “A Study of Imlunestrant, Investigator’s Choice of Endocrine Therapy, and Imlunestrant Plus Abemaciclib in Participants With ER+, HER2- Advanced Breast Cancer (EMBER-3)” at ClinicalTrials.gov

/////////Imlunestrant, FDA 2025, APPROVALS 2025, Inluriyo, CANCER, LY3484356, LY 3484356, 9CXQ3PF69U

Tags: APPROVALS 2025, CANCER, FDA 2025, Imlunestrant, Inluriyo, LY 3484356, LY3484356

By DR ANTHONY MELVIN CRASTO Ph.D in APPROVALS 2025, cancer, FDA 2025 on October 1, 2025.

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Example 1A

Alternate Preparation Example 1B

Crystalline 5-(4-{2-[3-(Fluoromethyl)azetidin-1-yl]ethoxy}phenyl)-8-(trifluoromethyl)-5H-[1]benzopyrano[4,3-c]quinolin-2-ol, Isomer 2

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