Synthesis of some benzimidazole-substituted benzotriazoles

2-Alkylsubstituted benzimidazoles ( 3a–h ) were prepared from the acid-catalyzed reaction of 4-methyl-1,2-phenylenediamine with corresponding carboxylic acids. Addition of these benzimidazoles to N-chloromethylbenzotriazole in the presence of sodium amide under reflux conditions gave the novel benzimidazole-substituted benzotriazoles ( 5a–f ). IR and 1 HNMR spectroscopy and elemental analysis were used for the identification of these compounds. Keywords:  Phenylenediamine, benzimidazole, benzotriazole