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Note | Regular issue | Vol 71, No. 8, 2007, pp.1821-1825
Published online, 25th May, 2007
DOI: 10.3987/COM-07-11070
■ A Simple and Efficient Method for Synthesis of Benzimidazoles Using FeBr3 or Fe(NO3)3·9H2O as Catalyst

Huiqiang Ma, Xiangming Han, Yulu Wang,* and Jinye Wang*

*College of Chemistry and Environmental Science, Henan Normal University, Xinxiang, 453007, Henan, China

Abstract

2-Substituted benzimidazoles have been synthesized in good yields in a single pot from o-phenylenediamine and aldehydes using FeBr3 or Fe(NO3)3·9H2O as catalyst. The salient features of this method include a simple procedure, mild conditions, shorter reaction time, less toxic catalyst and easy purification.