The object of the invention is an improved procedure for the synthesis of bicalutamide, characterised in that the 2-hydroxy-2-methyl-3-(4-fluorophenylthio) propionic acid initially produced undergoes a step to acylate the hydroxyl group in position 2 to give an intermediate 2-acyloxy-2-methyl-3-(4-fluorophenylthio) propionic acid, which allows the formation of a successive N-[4-cyano-3-(trifluoromethyl)-phenyl-]-3-[4-fluorophenylthio]-2-acyloxy-2-methyl-propionamide intermediate.
该发明的对象是一种改进的
比卡鲁胺合成方法,其特征在于最初生成的2-羟基-2-甲基-3-(4-
氟苯硫基)
丙酸经历一步酰化羟基在2位的过程,得到一个中间体2-酰氧基-2-甲基-3-(4-
氟苯硫基)
丙酸,这允许形成一个连续的N-[4-
氰基-3-(三
氟甲基)苯基]-3-[4-
氟苯硫基]-2-酰氧基-2-甲基-丙酰胺中间体。