[EN] IMPROVED PROCESS FOR THE PREPARATION OF HIGH PURITY ANASTROZOLE<br/>[FR] PROCEDE AMELIORE POUR LA PREPARATION D'UNE ANASTROZOLE A PURETE ELEVEE
申请人:NATCO PHARMA LTD
公开号:WO2005105762A1
公开(公告)日:2005-11-10
Present invention discloses an improved process for the preparation of high purity anastrozole of formula-I (2,2'-[5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-phenylene]di(2-methylpropio-nitrile) consisting of: (i) halogenation of 5, α, α, α', α'-pentamethyl-1,3-benzenediacetonitrile; (ii) reaction with sodium/potassium triazole; (iii) purification of crude anastrozole (containing more than 1% of triazole isomeric impurity) through salt formation; and (iv) isolation of pure anastrozole from its salts. It is observed that the removal of triazole isomeric impurity is possible only through a salt formation.
本发明揭示了一种改进的制备高纯度阿那曲唑(分子式-I为2,2'-[5-(1H-1,2,4-三唑-1-基甲基)-1,3-苯基]二(2-甲基丙腈))的工艺,包括:(i)对5,α,α,α',α'-五甲基-1,3-苯二乙腈进行卤代反应;(ii)与钠/钾三唑反应;(iii)通过盐形成纯化粗制品(含有超过1%三唑异构杂质的阿那曲唑);以及(iv)从其盐中分离纯净的阿那曲唑。观察到只有通过盐形成才能去除三唑异构杂质。