Selective estrogen receptor degrader

Abstract

A selective estrogen receptor degrader (SERD), a compound 3-(3,5-difluorophenyl)-2-[4-[(E)-3-[3-(fluoromethyl)azetidin-1-yl]prop-1-enyl]phenyl]-4-methyl-2H-chromen-7-ol, and its S enantiomer, (2S)-3-(3,5-difluorophenyl)-2-[4-[(E)-3-[3-(fluoromethyl)azetidin-1-yl]prop-1-enyl]phenyl]-4-methyl-2H-chromen-7-ol, or pharmaceutically acceptable salts thereof. Also provided are processes for their preparation. Also provided for is the use of these compounds for the treatment of diseases which are related to modulation of estrogen receptors, such as ER-positive breast cancer.

What is claimed is: 
     
         1 . A compound 3-(3,5-difluorophenyl)-2-[4-[(E)-3-[3-(fluoromethyl)azetidin-1-yl]prop-1-enyl]phenyl]-4-methyl-2H-chromen-7-ol represented by Formula I: 
       
         
           
           
               
               
           
         
         or a pharmaceutically acceptable salt thereof. 
       
     
     
         2 . A compound (2S)-3-(3,5-difluorophenyl)-2-[4-[(E)-3-[3-(fluoromethyl)azetidin-1-yl]prop-1-enyl]phenyl]-4-methyl-2H-chromen-7-ol represented by Formula Ia: 
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof. 
     
     
         3 . A pharmaceutical composition comprising a compound of  claim 1  and a pharmaceutically acceptable carrier, diluent, or excipient. 
     
     
         4 . A pharmaceutical composition comprising a compound of  claim 2  and a pharmaceutically acceptable carrier, diluent, or excipient. 
     
     
         5 . A method of treatment of a cancer in a human being, the method comprising administering an effective amount of the compound of  claim 1  to a human in need thereof, wherein the cancer is selected from the group consisting of breast cancer, endometrial cancer, brain cancer and ovary cancer. 
     
     
         6 . The method of treatment of  claim 5 , wherein the cancer is breast cancer. 
     
     
         7 . A method of treatment of a cancer in a human being, the method comprising administering an effective amount of the compound of  claim 2  to a human in need thereof, wherein the cancer is selected from the group consisting of breast cancer, endometrial cancer, brain cancer and ovary cancer. 
     
     
         8 . The method of treatment of  claim 7 , wherein the cancer is breast cancer. 
     
     
         9 . The compound of  claim 2 , wherein the content of compound of Formula Ib 
       
         
           
           
               
               
           
         
       
       is less than 25%, less than 20%, less than 15%, less than 10%, less than 5%, less than 1%, less than 0.5%, less than 0.1, less than 0.05%, less than 0.01% w/w or absent with respect to the compound of Formula Ia. 
     
     
         10 . The compound of  claim 2 , wherein the enantiomeric ratio of the compound of Formula Ia is greater than 75:25, greater than 80:20, greater than 85:15, greater than 90:10, greater than 95:5, greater than 99:1 or is 100:0. 
     
     
         11 . The pharmaceutical composition of  claim 3 , wherein an amount of S-enantiomer of Formula I present in the composition is at least 75% of a total amount of enantiomers of Formula I present in the composition. 
     
     
         12 . The pharmaceutical composition of  claim 11 , wherein the amount of S-enantiomer of Formula I present in the composition is at least 99% of the total amount of enantiomers of Formula I present in the composition. 
     
     
         13 . The pharmaceutical composition of  claim 12 , wherein the amount of S-enantiomer of Formula I present in the composition is 100% of the total amount of enantiomers of Formula I present in the composition.