Reaction of 3,3’ -bis(2-phenyl-5,5-dimethyl-4-oxopyrrolinylidene) 1,1’ -Dioxide with the Methoxide Anion

The title reaction in methanol includes the addition of MeO^– to the carbonyl group of a pyrrolinone ring followed by ring opening, and the one-electron oxidation of the formed anion results in the formation of a stable nitroxide, as found by cyclic voltammetry and EPR spectroscopy.