Microwave promoted synthesis of some N-(4-methyl-3-tolylthiazol-2(3H)-ylidene) substituted benzamides

N-(4-Methyl-3-tolylthiazol-2(3H)-ylidene) substituted benzamides (2a-o) were synthesized in good to excellent yields by the base-catalyzed direct cyclization of corresponding 1-tolyl-3-aryl thioureas (1a-o) with 2-bromoacetone through microwave irradiation in a solvent-free medium. Compared to traditional thermal heating, microwave irradiation provides a much more cleaner, efficient and faster method for synthesis of the title compounds.