Kinetically Controlled Stereoselective Access to Branched 1,3-Dienes by Ru-Catalyzed Remote Conjugative Isomerization
作者:Simone Scaringi、Clément Mazet
DOI:10.1021/acscatal.1c02144
日期:2021.7.2
3-dienes is described. These kinetic products are obtained in high yields, good levels of regiocontrol, and high stereoselectivity. A broad range of functional groups and heterocycles are compatible with the mild reaction conditions, and isomerization is sustained over long distances. Control experiments support a metal-hydride mechanism consisting of iterative migratory insertions/β-H eliminations, which
dimethylphenylsilylmethylmagnesium chloride result in highly regioselective dehydrohalogenation. The reaction does not follow the conventional E2 elimination mechanism but includes beta-hydride elimination from the corresponding alkylcobalt intermediate. The interesting reaction mechanism of the cobalt-catalyzed dehydrohalogenation offered unique transformations that are otherwise difficult to attain.