[EN] PALLADIUM CATALYZED INDOLIZATION OF 2-BROMO OR CHLOROANILINES<br/>[FR] INDOLISATION CATALYSEE PAR PALLADIUM DE 2-BROMANILINES OU DE CHLOROANILINES
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2005090302A2
公开(公告)日:2005-09-29
The present invention provides a method for making substituted indole compounds of general formula III comprising the step of: (a) reacting a 2-bromoaniline or 2-chloroaniline of general formula (I); wherein: X, R and R1 are defined herein with a substituted acetylene of formula (II); wherein R2 and R3 in the presence of a palladium catalyst, a ligand, and a base in a solvent at a suitable temperature to give a compound of formula (III)