[EN] PROCESS FOR THE PREPARATION OF INDOLE DERIVATIVES AND INTERMEDIATES OF THE PROCESS<br/>[FR] PROCESSUS DE PREPARATION DE DERIVES INDOLE ET D'INTERMEDIAIRES DE CE PROCESSUS
申请人:CIBA SC HOLDING AG
公开号:WO2001092223A1
公开(公告)日:2001-12-06
A process for the preparation of compounds of formula (1), wherein R1 is C1-C6alkyl and X is hydrogen, a hydrocarbon radical or a cation, wherein a compound of formula (2), wherein R1 is as defined above and R2 is hydrogen or a hydrocarbon radical, is reduced, the resulting compound of formula (3) is reacted with a compound that introduces the radical of formula -CH2-COOR3, wherein R3 has the meanings given above for R2, and the resulting compound of formula (4) is reduced and optionally hydrolysed.