摘要:
                                The oxidation of beta-oxonitrones, derivatives of pyrroline and imidazoline, afforded symmetric dimers with a C-C bond and dehydrodimers with a C = C bond.  Oxidation of the trifluoroacetyl imidazoline derivative afforded an asymmetric dimer.  The oxidative dimerization of endocyclic beta-oxonitrones, derivatives of pyrroline, proceeded much faster than that of exocyclic beta-oxonitrones, derivatives of imidazoline.  Imidazoline derivatives containing a perfluorophenyl or cyano group at the alpha-carbon atom on the nitrone group also underwent oxidative dimerization.