Heterocycles directly linked to 3-position of 1-benzopyran-4-ones

摘要

Syntheses and some important reactions of the title systems are reviewed.1-Benzopyran-4-one(chromone)moiety is a component of many biologically active substances of both natural and synthetic origins.Several other heterocyclic compounds are also bestowed with some biological activities.So a lot of interest centers on the synthesis and chemistry of a variety of heterocycles linked with or without any tether to the 2-or 3-position of a chromone moiety with the aim of obtaining molecules of potential medicinal applications.