ZINC SULPHATE CATALYZED SYNTHESIS OF 2-ARYL BENZIMIDAZOLES UNDER SONICATION
An expeditious synthesis of 2-aryl-benzimidazoles by the condensation of o-phenylenediamine with various arylaldehydes is
described. This greener protocol is catalyzed Zinc sulphate and proceeds efficiently in the absence of any organic solvent
under sonication.