Carboxy Group as a Remote and Selective Chelating Group for C−H Activation of Arenes
作者:Shangda Li、Hang Wang、Yunxiang Weng、Gang Li
DOI:10.1002/anie.201910691
日期:2019.12.16
The first example of carboxy group assisted, remote-selective C(sp2 )-H activation with a PdII catalyst has been developed and proceeds through a possible κ2 coordination of the carboxy group, thus suppressing the ortho-C-H activation through κ1 coordination. Besides meta-C-H olefination, direct meta-arylation of hydrocinnamic acid derivatives with low-cost aryl iodides has been achieved for the first
已经开发了用PdII催化剂进行羧基辅助的远程选择性C(sp2)-H活化的第一个例子,并通过羧基的可能κ2配位进行,从而通过κ1配位抑制了邻位CH活化。除间位CH烯烃化外,首次实现了肉桂酸衍生物与低成本芳基碘化物的直接间芳基化。这些发现可能会激发人们对具有选择性的羧基辅助CH活化反应的新型反应性的探索。