Aerobic Oxidative C–H Olefination of Cyclic <i>N</i>‑Sulfonyl Ketimines Catalyzed by a Rhodium Catalyst

Abstract

A useful method for the synthesis of <i>ortho</i>-olefinated ketimines from readily accessible cyclic <i>N</i>-sulfonyl ketimines and various olefins has been achieved. The reactions proceeded by Rh­(III)-catalyzed, <i>N</i>-sulfonyl ketimine-directed C–H cleavage under aerobic conditions. Further synthetic transformations of the olefinic products led to interesting heterocyclic molecules