Oxidative annulations via double CH bond cleavages: Approach to quinoline derivatives
作者:Zhenghui Liu、Shien Guo、Peng Wang、Zhenzhong Yan、Tiancheng Mu
DOI:10.1002/aoc.6156
日期:2021.4
system via oxidative annulations was proposed. A systematic exploration was completed. All kinds of reaction parameters were determined. And 55 kinds of target molecules were obtained with moderate to high yields. Combination of double oxidants made the conversion proceed smoothly. A clear reaction mechanism was put forward. Adjacent π systems might provide assistance for realizing the activation of relatively
Double C-H activations of C(5)-H and Csp(2)-H of 2-substituted N-vinyl- or arylimidazoles were realized without heteroatom-directing assistance by rhodium(III) catalyst. A subsequent oxidative annulation reaction with alkynes efficiently produced aza-fused heterocycles with high molecular complexity in low to excellent yields.
Enantioselective rhodium/ruthenium photoredox catalysis en route to chiral 1,2-aminoalcohols
作者:Jiajia Ma、Klaus Harms、Eric Meggers
DOI:10.1039/c6cc04397f
日期:——
A rhodium-based chiral Lewis acid catalyst combined with [Ru(bpy)3](PF6)2 as photoredox sensitizer allows for the visible-light-activated redox coupling of [small alpha]-silylamines with 2-acyl imidazoles to afford, after desilylation, 1,2-amino-alcohols in yields...