Synthesis of 2-arylbenzimidazoles catalyzed by transition metal nitrates |
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| Authors: | Mehdi Kalhor Akbar Mobinikhaledi Javad Jamshidi |
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| Affiliation: | 1. Chemistry Department, Payame Noor University, P.O. Box 19395-4697, Tehran, Iran
2. Department of Chemistry, University of Arak, P.O. Box 14335-186, Arak, Iran
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| Abstract: | A simple and practical procedure for synthesis of 2-arylbenzimidazoles by a one-pot condensation of o-phenylenediamine with aromatic aldehydes in the presence of a catalytic amount of M(NO3)2·6H2O (M = Mn, Fe, Co, Ni, Cu) in ethanol at room temperature is described. Major advantages of this practical procedure are use of a readily available catalyst, high yields, short reaction times, and simplicity of the reaction and workup. |
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