Asymmetric Counteranion Directed Catalytic Heck/Tsuji–Trost Annulation of Aryl Iodides and 1,3-Dienes
作者:Jia-Cheng Xu、Yi-Zhuo Yin、Zhi-Yong Han
DOI:10.1021/acs.orglett.1c00910
日期:2021.5.21
anion-mediated asymmetric Heck/Tsuji–Trost reaction of aryl iodides and 1,3-dienes is presented. Chiral indoline derivatives could be afforded with remarkably higher yields and enantioselectivities than our previous chiral ligand-based method. Silver carbonate is employed as both base and halide scavenger to ensure fast and recyclable exchange of the catalytic amount of chiral anions. Fast salt metathesis,
提出了手性阴离子介导的芳基碘化物和1,3-二烯的不对称Heck / Tsuji-Trost反应。与我们以前的基于手性配体的方法相比,可以提供高得多的收率和对映选择性的手性二氢吲哚衍生物。碳酸银同时用作碱和卤化物清除剂,以确保催化量的手性阴离子的快速和可循环交换。快速的盐复分解以及手性阴离子的促进作用都可以有益于反应的立体控制。