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E-Journal of Chemistry
Volume 9, Issue 3, Pages 1064-1069

1,3-Dibromo 5,5-dimethylhydantoin (DBH)-Catalyzed Solvent-Free Synthesis of 2-arylbenzimidazoles under Microwave Irradiation

1Department of Chemistry, Payamenoor University, 19395-4697, Tehran, Iran
2Department of Chemistry, Islamic Azad University-Babol Branch, P.O. Box 755, Babol 47188-33348, Iran

Received 5 November 2011; Accepted 15 January 2012

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An expeditious synthesis of 2-aryl-benzimidazoles by the condensation of o-phenylenediamine with various arylaldehydes is described. This greener protocol is catalyzed by 1,3-Dibromo 5,5-dimethylhydantoin (DBH), and proceeds efficiently in the absence of any organic solvent under thermal condition and microwave irradiation in high yields.