Synthesis

One-pot efficient synthesis of 2-aryl-1-arylmethyl-1H-benzimidazoles and 2, 4, 5-triaryl-1H-imidazoles using oxalic acid catalyst

ND Kokare, JN Sangshetti, DB Shinde

Index: Kokare, Nagnnath D.; Sangshetti, Jaiprakash N.; Shinde, Devanand B. Synthesis, 2007 , # 18 p. 2829 - 2834

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Citation Number: 64

Abstract

Abstract Oxalic acid was found to be a versatile catalyst for the synthesis of 2-aryl-1- arylmethyl-1H-benzimidazoles and 2-aryl-4, 5-diphenyl-1H-imidazoles in moderate to excellent isolated yields. 2-Aryl-1-arylmethyl-1H-benzimidazoles were efficiently synthesized from o-phenylenediamine and various substituted aldehydes using 10 mol% oxalic acid. 2-Aryl-4, 5-diphenyl-1H-imidazoles were synthesized from benzil or benzoin, ...