Antioxidant Activity of the Fused Heterocyclic Compounds, 9H-Xanthene-2, 7-diols

Abstract

9H-Xanthene-2, 7-diols were shown to function well as hydrogen donor and suppress the oxidation of linoleic acid in homogeneous solution. In contrast to most other phenolic antioxidants these 9H-xanthene-2, 7-diols react with 26 peroxyl radicals per molecule and their antioxidant activities were close to that of α-tocopherol. The relationship of the antioxidant activity and electronic effects on stabilization of derived phenoxyl radicals were discussed.