Solvent-free and catalyst-free method for the synthesis of. 2.4,5-triarylimidazoles under microwave irradiation

A facile procedure for the synthesis of 2,4,5-triarylimidazoles is being reported starting from benzil, aromatic aldehyde and ammonium acetate. The reactions were carried out with catalyst-free, solvent-free and under microwave irradiation conditions in high yield (80-99%) with short time (3-5 min) and environmental benign, as well as convenient operation. The structures of the compounds have been confirmed on the basis of their IR, H-1 NMR, and/or C-13 NMR, MS, and elemental analyzer. (C) 2009 Jian Feng Zhou. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.