Electrochemical study of quercetin in the presence of galactopyranose: Potential application to the electrosynthesis of glycoconjugates of quinone/quinone methide of quercetin

Abstract

Abstract Quercetin and quercetin derivatives are strong flavonoid antioxidants. Electrochemical oxidation of quercetin in the presence of 1,2,3,4-di-O-diisopropylidene-α- d -galactopyranose in acetonitrile has been studied using controlled-potential electrolysis, cyclic voltammetry and spectroscopy (UV–vis and LCMS). The results indicate that quercetin undergoes electrooxidation forming 2-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxy-3(2H) benzofuranone and monoglycoconjugate of benzofuranone, subsequently.