Reaction of quercetin with superoxide anion radical is triggered by proton abstraction from quercetin to yield dismutated products of superoxide and deprotonated quercetin, which allows quercetinase-like dioxygenation to give the corresponding depside in a high yield.
K. Kano, T. Mabuchi, B. Uno, Y. Esaka, T. Tanaka and M. Linuma, J. Chem. Soc., Chem. Commun., 1994, 593 DOI: 10.1039/C39940000593
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