[EN] A PROCESS FOR THE PREPARATION OF RIVAROXABAN BASED ON SAVING OF 1,1'-CARBONYL DIIMIDAZOLE.<br/>[FR] PROCÉDÉ DE PRÉPARATION DE RIVAROXABAN FONDÉ SUR L'ÉCONOMIE DE 1,1'-CARBONYLDIIMIDAZOLE
申请人:ZENTIVA KS
公开号:WO2013120464A1
公开(公告)日:2013-08-22
The invention provides a method of carrying out the cyclization of the compound of formula (14) to the compound (15), wherein first a non-cyclic intermediate (16) is prepared by the treatment with 1 to 1.5 equivalents of 1,1'-carbonyldiimidazole of formula (8), which further converts into the cyclic product (15) by treatment with heat or a base. The present method of cyclization of the compound (14) to the compound (15) is preferred and distinguished from the prior methods by the use of a lower amount of the expensive carbonylation agent, which is compensated by use of a cheap base (17), wherein R means an alkyl and M means an alkali metal.
该发明提供了一种将化合物的环化方法转化为式(14)的化合物(15),其中首先通过与式(8)的1至1.5当量的1,1'-碳酰二咪唑处理制备非环状中间体(16),然后通过加热或碱处理将其进一步转化为环状产物(15)。本方法将化合物(14)环化为化合物(15)的方法是首选的,并通过使用较少量昂贵的羰基化试剂来区别于先前的方法,这通过使用廉价的碱(17)进行补偿,其中R代表烷基,M代表碱金属。