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