[EN] REGIOSELECTIVE SYNTHESIS OF LETROZOLE<br/>[FR] SYNTHÈSE RÉGIOSÉLECTIVE DE LÉTROZOLE
申请人:GENERICS UK LTD
公开号:WO2010146391A1
公开(公告)日:2010-12-23
The present invention relates to an improved process for the preparation of letrozole (I) and its pharmaceutically acceptable salts, to compositions comprising letrozole or a pharmaceutically acceptable salt thereof, and to uses of such compositions. In particular it relates to a process and to novel intermediates for preparing letrozole and its salts substantially free from regioisomeric impurities.