Autoxidation of polysubstituted isoindoles. Part II. Products from 1,3-diphenyl- and 1,2,3-triphenyl-isoindoles

Abstract

2-(α-Iminobenzyl)benzophenones are obtained by autoxidation of 1,2,3,4,7-pentasubstituted isoindoles in which phenyl groups occupy the 1- and 3-positions. Where the isoindole 2-position also bears a phenyl group, the autoxidation is achieved under u.v. irradiation and the corresponding imine reacts further to give a phenanthridine derivative. Where the isoindole 2-position is unsubstituted, autoxidation products are 1-oxy-substituted 1H-isoindole derivatives.