[EN] NOVEL PROCESS FOR THE PREPARATION OF ETRAVIRINE<br/>[FR] NOUVEAU PROCÉDÉ DE PRÉPARATION D'ÉTRAVIRINE
申请人:MYLAN LAB LTD
公开号:WO2012147104A1
公开(公告)日:2012-11-01
The present invention relates to a novel process for the preparation of Etravirine, comprises; condensing ethyl cyanoacetate with N-cyanophenylguanidine to obtain -OH compound of formula (II), which is further converted to a leaving group of formula (III). Compound of formula (III) is optionally protected and brominated to yield compound of formula (IV). Condensation of formula (IV) with 3,5-dimethyl-4-hydroxybenzonitrile gives formula (VI), and an optional deprotection of formula (VI) results into Etravirine. The present invention further relates to process for purifying Etravirine. The present invention also provides novel intermediates of Etravirine.