Synthesis and tautomerism of aryl- and hetaryl-azo derivatives of bi- and tri-heterocycles

Abstract

This review summarizes results from the literature concerning synthesis and azo-hydrazone tautomerism of arylazo- and hetarylazo-derivatives of various bi- and tri-heterocycles reported by us and other research groups from 1981 to mid 2009.

Keywords

• Heterocycles
• Azodyes
• Azocoupling
• Tautomerism
• Hydrazonoyl halides