An Improved Procedure for the Synthesis of Benzimidazoles, Using Palladium-Catalyzed Aryl-Amination Chemistry
作者:Christopher T. Brain、James T. Steer
DOI:10.1021/jo034824l
日期:2003.8.1
New, improved conditions have been developed and optimized for the synthesis of benzimidazoles by intramolecular palladium-catalyzed aryl-amination chemistry. This methodology, combined with a "catch and release" purification strategy, has led to a range of these heterocycles being prepared rapidly and in excellent yield.
An intramolecular palladium-catalysed aryl amination reaction to produce benzimidazoles
作者:Christopher T Brain、Shirley A Brunton
DOI:10.1016/s0040-4039(02)00132-6
日期:2002.3
A novel synthesis of benzimidazoles by a palladium-catalysed intramolecular N-arylation reaction from (o-bromophenyl)amidine precursors is described. (C) 2002 Elsevier Science Ltd. All rights reserved.
Iridium-catalyzed intramolecular C N and C O/S cross-coupling reactions: Preparation of benzoazole derivatives
The irdium-catalyzed intramolecular arylcarbon-hetero cross-coupling reactions with o-haloarylamides or o-haloarylamidine have been effectively achieved using KOAc and just 1 mol% catalyst. The [Ir(cod)Cl]2 was proved to be more potential for smoothly assembling functional structures benzimidazoles, benzoxazoles and benzothiazoles, which was superior to Cu- and Pd-catalyzed systems. Simultaneously