Convenient peripheral aroyloxylation reactions of porphyrins and chlorophyll-a-based chlorins with benzoyl peroxide

Abstract A practical and efficient methodology for the formation of C–O bonds on the porphyrin/chlorin periphery was developed. The aroyloxy-substituted porphyrins and chlorins related to chlorophyll- a at the β- and meso -positions, respectively, were conveniently synthesized by the free radical substitution reaction with benzoyl peroxide and its homologs.