The superoxide anion radical, generated from KO2 upon treatment with a crown ether, induces the autoxidation of the cyclohexenones (I) and (III), yielding the hydroxycyclohexadienones (II).
Autoxidation of the hydroxycyclohexadienones (I) in the presence of the superoxide anion radical, generated from KO2 and a crown ether, produces the lactols (II).
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