Axially Chiral Dibenzazepinones by a Palladium(0)-Catalyzed Atropo-enantioselective C−H Arylation
作者:Christopher G. Newton、Elena Braconi、Jennifer Kuziola、Matthew D. Wodrich、Nicolai Cramer
DOI:10.1002/anie.201806527
日期:2018.8.20
Atropo‐enantioselective C−H functionalization reactions are largely limited to the dynamic kinetic resolution of biaryl substrates through the introduction of steric bulk proximal to the axis of chirality. Reported herein is a highly atropo‐enantioselective palladium(0)‐catalyzed methodology that forges the axis of chirality during the C−H functionalization process, enabling the synthesis of axially
通过引入靠近手性轴的空间体积,对映体-对映体选择性C-H官能化反应在很大程度上限于联芳基底物的动态动力学拆分。本文报道的是一种高度阻转对映体选择性钯(0)催化的方法,该方法在CH功能化过程中形成了手性轴,从而能够合成轴向手性二苯并ze庚酮。计算研究支持实验确定的消旋化障碍,同时也表明通过对映确定CMD产生构型稳定的八元palladacycles来进行CH功能化。