Highly enantioselective trapping of zwitterionic intermediates by imines
作者:Huang Qiu、Ming Li、Li-Qin Jiang、Feng-Ping Lv、Li Zan、Chang-Wei Zhai、Michael P. Doyle、Wen-Hao Hu
DOI:10.1038/nchem.1406
日期:2012.9
trap the zwitterionic intermediates. Here, we describe the use of imines, activated by chiral organocatalysts, and a highly efficient integrated rhodium and chiralBrønstedacid co-catalysed process to trap zwitterionic intermediates that have been proposed previously to undergo a formal C–H insertion reaction, allowing us to obtain polyfunctionalized indole and oxindole derivatives in a single step
Construction of 4-hydroxycoumarin derivatives with adjacent quaternary and tertiary stereocenters <i>via</i> ternary catalysis
作者:Mengchu Zhang、Tianyuan Zhang、Sifan Yu、Huang Qiu、Abdulla Yusuf、Xinfang Xu、Yu Qian、Wenhao Hu
DOI:10.1039/d3sc03452f
日期:——
4-Hydroxycoumarinderivatives represent one of the most important scaffolds in biologically active substances, pharmaceuticals and functional materials. Herein, we describe an efficient Pd/amine/Brønsted acid ternary-catalytic multicomponent reaction for the rapid construction of substituted 4-hydroxycoumarinderivatives with adjacent quaternary and tertiary stereocenters via convergent assembly of