A process for the preparation of anastrozole is provided, the process comprising:
(a) reacting 3,5-bis(1-cyano-1-methylethyl)benzyl halide with a 4-Z-1,2,4-triazole compound of the formula
wherein Z is a protecting group to produce 2,2′-[5-(4-Z-1,2,4-triazolium-1-ylmethyl)-1,3-phenylene]di(2-methylpropionitrile) halide; and (b) deprotecting the 2,2′-[5-(4-Z-1,2,4-triazolium-1-ylmethyl)-1,3-phenylene]di(2-methylpropionitrile)halide to produce anastrozole. Also provided is anastrozole substantially free of its isomers.
提供一种制备
阿那曲唑的方法,该方法包括:(a)将3,5-双(1-
氰基-1-甲基乙基)苄卤化物与具有以下结构的4-Z-
1,2,4-三唑化合物发生反应,其中Z是保护基,以产生2,2′-[5-(4-Z-
1,2,4-三唑-1-基甲基)-1,3-苯基]二(2-甲基
丙腈)卤化物;和(b)去保护2,2′-[5-(4-Z-
1,2,4-三唑-1-基甲基)-1,3-苯基]二(2-甲基
丙腈)卤化物以产生
阿那曲唑。还提供了基本不含异构体的
阿那曲唑。