Conventional and ultrasound mediated synthesis of some thiadiazoles,triazoles and oxadiazoles

摘要

Acid hydrazide 1 when treated with aryl isothiocyanates gives the compounds 2.These compounds 2 on ultrasound irradiation in acidic medium give compounds 3 i.e.thiadiazoles and in basic medium gives compounds 4 i.e.triazoles.These compounds 2 on treatment with I_2/KI and NaOH resulted in compounds 5 i.e.oxadiazoles.These compounds are synthesized by conventional method as well as ultra sound irradiation method.