Amidoximes (1) reacted with isopropenyl acetate in presence of KSF und
er microwave irradiation and Save 1,2,4-oxadiazoles (2). 1,2,4-Oxadiaz
oles (4) can also be obtained by microwave irradiation from O-acylamid
oximes (3) adsorbed on Alumina. 1,3,4-Oxadiazoles (6) were obtained by
irradiation of bis (acyl) hydrazines (5) in thionyl chloride.