Abstract The microwave-enhanced reactions of 4-amino-5-mercapto-3-substituent-1, 2, 4- triazoles with benzoyl chloride or arylaldehydes under solvent-free conditions without catalyst were studied. 3-Substituded-6-phenyl-1, 2, 4-triazolo [3, 4-b]-1, 3, 4-thiadiazoles were easily prepared by the reactions of 4-amino-5-merecapto-3-substituded-1, 2, 4- triazoles with benzoyl chloride. 4-Arylideneamino-5-mercapto-3-substituted-1, 2, 4- ...