Introduction In recent years, Benzoazoles and their derivatives have been of much significance due to their medical, physiological and biological properties [1] they are found in antiviral, antiulcer, antifungal, antihypertensive, anticancer, antihistamine antiinflammatory, [2, 3] antidepressant, antitumor, antifungal, antimycotic, antibiotic, antiulcerative, antibacterial and anti-allergic [4] compounds. Benzimidazoles and their derivatives are also known to be the key reaction intermediates in organic synthesis [5] for which two general methods have been reported. They include condensation of 2-aminothiophenol or 1, 2-phenylenediamine with carboxylic acids or their derivatives (nitriles, imidates, or ortho-esters) [6] in the presence of strong catalysts like Bronsted and Lewis acids (AlCl3 and BF3) [7] and the oxidative cyclization of 1, 2-phenylenediamine and 2-aminothiophenol with aldehydes [8]. The later method implies broad applicability due to the existence of a wide variety of aldehydes and oxidative reagents (i. e. nitrobenzene,...