1,3-Dipolar character of six-membered aromatic rings. Part VII. 1-Phenyl-3-oxidopyridinium
Abstract
The title compound reacts as a 1,3-dipole with N-phenylmaleimide, acrylonitrile, methyl acrylate, and benzyne to give isomeric cycloadducts. The n.m.r. spectra of these products are discussed with particular reference to stereochemistry.