The present invention provide processes for the preparation of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I).
The present application also provides a method of purification of N-[4-Cyano-3-(trifluoro methyl)phenyl]-3-[(4-fluorophenyl)sulphonyl]-2-hydroxy-2-methyl propanamide (I) using ethyl acetate solvent resulting in the product, substantially free from process related impurities A, B, C and D. The crystalline product of the process according to the present invention having an XRDP pattern as per FIG.
1
, is useful as an active pharmaceutical and has anti-androgenic activity.
本发明提供了一种制备N-[4-
氰基-3-(三
氟甲基)苯基]-3-[(4-
氟苯基)磺酰基]-2-羟基-2-甲基丙酰胺(I)的工艺。本申请还提供了一种利用
乙酸乙酯溶剂纯化N-[4-
氰基-3-(三
氟甲基)苯基]-3-[(4-
氟苯基)磺酰基]-2-羟基-2-甲基丙酰胺(I)的方法,从而得到基本上不含有工艺相关杂质A、B、C和D的产品。根据本发明的工艺得到的结晶产品具有如图1所示的X射线衍射图谱,可用作活性药物,并具有抗雄激素活性。