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Facile route for the synthesis of benzothiazoles and benzimidazoles in the presence of tungstophosphoric acid impregnated zirconium phosphate under solvent-free conditions

✍ Scribed by Hamid Aliyan; Razieh Fazaeli; Nahid Fazaeli; Ahmad Reza Mssah; Hamid Javaherian Naghash; Mohammad Alizadeh; Ginous Emami

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
163 KB
Volume
20
Category
Article
ISSN
1042-7163

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✦ Synopsis

Abstract

Rapid and efficient condensation reactions of o‐phenylenediamine and o‐aminothiophenol with various aldehydes were carried out using tungstophosphoric acid impregnated zirconium phosphate in solvent‐free conditions to afford the corresponding 2‐substituted arylbenzimidazole and arylbenzothiazole derivatives in good to excellent yields. This procedure constitutes a simple and practical green synthetic method for 2‐arylbenzimidazoles and 2‐arylbenzothiazoles and their structural analogs. Furthermore, the catalyst can be reused for several times but it will be less active. © 2009 Wiley Periodicals, Inc. Heteroatom Chem 20:202–207, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20534

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