The dye-sensitized photo-oxidation of the title mesomeric betaine yields two pairs of epoxy-ketones and α,β-unsaturated ketones, formally arising from addition of singlet oxygen to its two 1,3-dipolar mesomeric forms (2a) and (2b); in methanol stable methoxy-hydroperoxides are obtained.
A. Albini, G. F. Bettinetti, G. Minoli and G. Vasconi, J. Chem. Soc., Chem. Commun., 1981, 1089b DOI: 10.1039/C3981001089B
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