[EN] PROCESSES FOR THE PREPARATION OF FEBUXOSTAT AND SALTS THEREOF<br/>[FR] PROCÉDÉS POUR LA PRÉPARATION DE FEBUXOSTAT ET DE SELS DE CELUI-CI
申请人:CIPLA LTD
公开号:WO2011073617A1
公开(公告)日:2011-06-23
There is provided a process for preparing febuxostat of formula (I) or a pharmaceutically acceptable salt thereof, the process comprising: condensing a compound of formula (A) with a compound of formula (B) to form an ester of febuxostat; hydrolyzing the ester of febuxostat to febuxostat, and optionally converting the febuxostat to a pharmaceutically acceptable salt thereof, wherein: R' is an activating group selected from boronic acid or lithium; R is selected from optionally substituted C1-4 alkyl or optionally substituted aryl; L is a leaving group selected from diazo, halo, -OSO2R", -OCOR" or -O-Si(R")3; and R" is selected from optionally substituted C1-4 alkyl or optionally substituted aryl.
提供了一种制备式(I)的非布索他的过程或其药用盐的方法,该方法包括:将式(A)的化合物与式(B)的化合物缩合以形成非布索他的酯;水解非布索他的酯以得到非布索他,并可选择将非布索他转化为其药用盐,其中:R'是从硼酸或锂中选择的活化基团;R从可选择的取代的C1-4烷基或可选择的取代的芳基中选择;L是从重氮基,卤素,-OSO2R",-OCOR"或-O-Si(R")3中选择的脱离基团;R"从可选择的取代的C1-4烷基或可选择的取代的芳基中选择。