AN EFFICIENT AND ECO-FRIENDLY SYNTHESIS OF 2-ARYLBENZIMIDAZOLES USING SILICA GEL AS CATALYST

Asok K. Mallik, Swati Samanta, Chayan Guha

Abstract


An efficient and eco-friendly method for synthesis of 2-arylbenzimidazoles has been developed simply by grinding intimate mixtures of ortho-phenylenediamine, aromatic aldehyde and TLC grade silica gel at room temperature for 30-50 minutes. This one pot synthesis involves aerial oxidation of an intermediate 2-arylbenzimidazoline formed by condensation of the reactants followed by cyclization.


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DOI: http://dx.doi.org/10.17628/ecb.2014.3.396-399

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