Abstract

a-Tocopherol was reacted with cholesteryl linoleate hydroperoxides (Ch18:2-OOH) in the presence of an iron-chelate, Fe(III) acetylacetonate, at 37 degrees C in benzene. The reaction products were isolated and identified as four positional isomers of cholesteryl (8a-dioxy-alpha-tocopherone)-epoxyoctadecenoates and two positional isomers of cholesteryl (8a-dioxy-alpha-tocopherone)-octadecadienoates. The result indicates that the peroxyl radicals from Ch18:2-OOH react with the 8a-carbon radical of alpha-tocopherol to form the addition products.

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