Alkylideneaminyl radicals are generated from O-2,4-dinitrophenyloximes of γ,δ-unsaturated ketones by treatment with NaH and 3,4-methylenedioxyphenol. The resulting radical species successively add to the olefinic moiety intramolecularly to afford 3,4-dihydro-2H-pyrroles.
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Uchiyama et al. (1998) studied this question.
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