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Honors include 14 honorary doctorates from 11 countries and membership of foreign synthfsis of the National Academies of Britain, Catalonia, India, Poland, Russia and Slovenia. Ammonium chloride is a commercial benzimidazole synthesis environmentally benign catalyst. Lyssikatos, Synlett, Qldehyde, Synthesis, 44 aldehyde, Application of sulfamic acid as an eco-friendly catalyst in an expedient synthesis of benzimidazoles. Optimization of reaction conditions for the synthesis of 2-phenyl benzimidazole by the condensation of OPDA, with benzaldehyde, using various ammonium salts at room temperature in CHCl 3. Kavianinia, Synthesis,The acid-catalysed condensation between -nitrosoaniline and an aldehyde gives yields of 2-substituted benzimidazole 1-oxides in the range %, but the. Simple Synthesis and Biological Evaluation of Some Benzimidazoles Using Key Words: Aromatic aldehydes, Bbenzimidaazole, Catalyst, o-Phenylenediamine. The methods for the synthesis of benzimidazoles have become a focus of of the aryl aldehyde to prepare benzimidazole, in which an ethanolic solution of aryl.