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An International Journal for Reviews and Communications in Heterocyclic ChemistryWeb Edition ISSN: 1881-0942
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October 15, 2019
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Published online, 17th April, 2008
■ A Facile One-Pot Synthesis of Benzimidazoles from 2-Nitroanilines by Reductive Cyclization
Zheng Liu, Haihong Li, Qingjie Zhao, and Jingshan Shen
*Shanghai Institute of Materia Medica, The Chinese Academy of Sciences, 319 Yue-Yang Raod, Shanghai 200031, China
Abstract
A facile one-pot process to prepare benzimidazole derivatives is described. Reductive cyclization of a serial of 2-nitroanilines with orthoesters in the presence of Pd/C in methanol at room temperature, which is promoted by a catalytic amount of acetic acid, affords the corresponding benzimidazole derivatives in high yields.
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