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Abstract
A series of 2-heterocyclicalkylthiooxazolo[4,5-b]pyridines have been prepared through the reaction of 2-(hydrazinocarbomethylthio)oxazolo[4,5-b]pyridine with the appropriate reagents. 2-Ethylthiooxazolo[4,5-b]pyridine has been successfully employed to synthesize some fused- triheterocyclic compounds.