An efficient route to vinyl substituted oxadiazoles and triazoles using phenylselanyl derivatives as precursor

Vinyl substituted oxadiazoles and triazoles were obtained from selenoxide syn-elimination of phenylselanylethyl substituted oxadiazoles and triazoles, which were prepared through hydrazinolysis, acylation, and cyclocondensation reactions of phenylselanyl-propionate. Using phenylselanyl group as the precursor of terminal double bond is critical to the success of the reactions.