Advances in the Synthesis of Heterocycles with Two and Three Heteroatoms using Hydrazonoyl Halides
Nargiza R. Yamaletdinova,
Rail R. Gataullin
Abstract:The review covers the results of studies published in the literature on the use of hydrazonoyl halides in the synthesis of five‐ (pyrazoles, thiazoles, triazoles, oxa‐ and thiadiazoles), six‐ (oxa‐ and thiadiazines, indazoles, pyridazines, pyrazines, tetrazines) or seven‐membered (benzotriazepine) heterocycles. In the formation of these heterocycles, the main intermediate stage of the reaction is the in situ generation of nitrilimine, which enters into a cycloaddition reaction with substituted acetylenes (incl… Show more
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