Aerobic Oxidative C–H Olefination of Cyclic N-Sulfonyl Ketimines Catalyzed by a Rhodium Catalyst
摘要:
A useful method for the synthesis of ortho-olefinated ketimines from readily accessible cyclic N-sulfonyl ketimines and various olefins has been achieved. The reactions proceeded by Rh(III)-catalyzed, N-sulfonyl ketimine-directed C-H cleavage under aerobic conditions. Further synthetic transformations of the olefinic products led to interesting heterocyclic molecules.
Ruthenium-Catalyzed C-H Amidation and Alkenylation of Cyclic<i>N</i>-Sulfonyl Ketimines
作者:Ramasamy Manoharan、Masilamani Jeganmohan
DOI:10.1002/ejoc.201600505
日期:2016.8
A highly regioselective ruthenium-catalyzedC–Hamidation of cyclic N-sulfonyl ketimines with organic sulfonyl azides is described. An alkenylation at the C–H bond of cyclic N-sulfonyl ketimines with various alkenes was also carried out. Only a catalytic amount of the oxidant Cu(OAc)2 was used in the reaction; the remainder of the required amount of oxidant was formed by regeneration of Cu(OAc)2 under
A useful method for the synthesis of ortho-olefinated ketimines from readily accessible cyclic N-sulfonyl ketimines and various olefins has been achieved. The reactions proceeded by Rh(III)-catalyzed, N-sulfonyl ketimine-directed C-H cleavage under aerobic conditions. Further synthetic transformations of the olefinic products led to interesting heterocyclic molecules.