Thiazol-4(5H)-one Derivatives in Heterocyclic Synthesis: a New Route for the Synthesis of Several New Pyrano[2,3-d]thiazole and Annelated Pyrazole Derivatives

Abstract

2-Hydrazinothiazol-4(5H)-one (1) reacted with a variety of cinnamonitrile derivatives (2) and activated nitriles (3) to yield several new pyrano[2,3-d]thiazole and annelated pyrazoles; structures were confirmed by elemental analyses and spectral data studies.