Photo-oxidation of carbanions: the reactivity of singlet oxygen with 9-benzenesulphonylfuoren-9-yl anion
Abstract
The oxidation of 9-substituted fluoren-9-yl anions to fluorenone by molecular oxygen in t-butyl alcohol is markedly accelerated by irradiation of added dye sensitisers (e.g., rose bengal) or by direct excitation of the carbanion, singlet oxygen being involved in both cases.