Upon irradiation under 1,4-dicyanonaphthalene- or 9,10-dicyanoanthracene-sensitized conditions, 3,3-diaryl-1-dideuteriomethylenecyclobutanes underwent degenerate methylenecyclobutan rearrangement through allylically stabilized 1,4-cation radicals which could be successfully intercepted by molecular oxygen.
T. Miyashi, Y. Takahashi, K. Yokogawa and T. Mukai, J. Chem. Soc., Chem. Commun., 1987, 175 DOI: 10.1039/C39870000175
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