Pyrolysis of 5-phenyl-2-benzylthio-1,3,4-oxadiazol(e1 ) by heating at ca. 250°C in a sealed tube gives
rise to CO,, H,S, H,O, benzyl thiocyanate, benzonitrile, benzyl sulfide, aniline, benzamide, benzaldehyde, 2-mercaptoquinazolinone, dibenzyl, stilbene, and tetraphenylthiophene. Furthermore pyrolysis
of 5-phenyl-2-phenacylthio-l,3,4-oxadiazol(9e) gives analogous results, besides phenancyl thiocyanate.
Pyrolysis of 5(2-hydroxyphenyl)-2-benzylthio-1,3,4-oxadiazol(e1 1) gives 2-hydroxybenzonitrile, 5(2-hydroxypheny1)-I ,3,4-oxadiazole-2-thioia,n d 2-hydroxybenzamide, in addition to the previous obtained results. The mechanism of these results has been discussed