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Paper | Regular issue | Vol 24, No. 7, 1986, pp.1873-1881
Published online, 1st January, 1970
DOI: 10.3987/R-1986-07-1873
Behaviour of o-Phenylenediamine and o-Aminothiophenol with Aziactones. A New Synthesis of Some Benzimidazole and Benzothiazole Derivatives

Abdel-Fattah A. Harb, Salem E. Zayed, Awatef M. El-Maghraby, and Saoud A. Metwally*

*Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt


A new route for the preparation of benzimidazoles (5) and benzothiazoles (10) is described. o-Phenylenediamine reacted with 2-aryl-4-arylidene-2-oxazolin-5-ones to give the corresponding benzimidazole derivatives (5) while o-aminothiophenol produced either benzothiazole (10) or intermediates (8) and (9) which could be cyclised to (10).