S. Lutun et al., A new synthesis of 1,3,4-oxadiazoles. Cyclization of N,N '-diacylhydrazines catalyzed by palladium(0)., SYN COMMUN, 29(1), 1999, pp. 111-116
Several 1,3,4-oxadiazoles were synthetized by cyclization of N,N'-diacylhyd
razines catalyzed by palladium(0). Water formed during the reaction is resp
onsible for the hydrolysis of the products. To avoid it, we introduced benz
oic anhydride into the medium and obtained an increased yield of oxadiazole
s.