[EN] AN IMPROVED PROCESS FOR PREPARATION OF LETROZOLE AND ITS INTERMEDIATES<br/>[FR] PROCÉDÉ PERFECTIONNÉ DE PRÉPARATION DU LÉTROZOLE ET SES INTERMÉDIAIRES
申请人:DABUR PHARMA LTD
公开号:WO2009069140A1
公开(公告)日:2009-06-04
The present invention relates to an improved process for preparation of the non-steroidal aromatase inhibitor drug, Letrozole of formula (I) and its intermediates, 4-[1-(1,2,4-triazolyl) methyl]-benzonitrile of formula (IV) and 4-[1-(1,2,4-triazolyl) methyl]-benzonitrile hydrochloride of formula (VII), all having a purity of ≥99%, which is simple, convenient, economical, does not use hazardous chemicals and industrially viable.
本发明涉及一种改进的制备式(I)的非甾体芳香化酶抑制剂药物来曲唑及其中间体,式(IV)的4-[1-(1,2,4-三唑基)甲基]-苯腈和式(VII)的4-[1-(1,2,4-三唑基)甲基]-苯腈盐酸盐,所有纯度≥99%,该法简单、方便、经济、不使用有害化学品且适合工业生产。