

SODIUM HYPOCHLORITE-MEDIATED SYNTHESIS OF 2,5-DISUBSTITUTED 1,3,4-OXADIAZOLES FROM HYDRAZIDES AND ALDEHYDES

Abstract
A simple and convenient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles has been developed. Structurally divergent symmetrical and unsymmetrical 2,5-disubstituted 1,3,4-oxadiazoles can be obtained in moderate to high yields via NaOCl-mediated oxidative cyclization of N-acylhydrazones, generated in situ from aliphatic and aromatic hydrazides and aldehydes.
Keywords
N-acylhydrazone; aldehyde; hydrazide; oxadiazole; sodium hypochlorite; oxidative cyclization.
Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv