The First Regioselective Palladium-Catalyzed Indolization of 2-Bromo- or 2-Chloroanilines with Internal Alkynes: A New Approach to 2,3-Disubstituted Indoles
摘要:
The first practical and economical process for synthesis of 2,3-disubstituted indole compounds has been developed with high regioselectivity by palladium-catalyzed indolization of 2-bromo- or chloroanilines and their derivatives with internal alkynes.
Palladium catalyzed indolization of 2-bromo or chloroanilines
申请人:Li Guisheng
公开号:US20050209465A1
公开(公告)日:2005-09-22
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)
(I)
wherein: X, R and R
1
are defined herein
with a substituted acetylene of formula (II)
wherein R
2
and R
3
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);
PALLADIUM CATALYZED INDOLIZATION OF 2-BROMO OR CHLOROANILINES
申请人:BOEHRINGER INGELHEIM INTERNATIONAL GMBH
公开号:EP1727796A2
公开(公告)日:2006-12-06
US7126009B2
申请人:——
公开号:US7126009B2
公开(公告)日:2006-10-24
US7408076B2
申请人:——
公开号:US7408076B2
公开(公告)日:2008-08-05
[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)