<i>meta</i>
‐Selective C−H Arylation of Fluoroarenes and Simple Arenes
作者:Luo‐Yan Liu、Jennifer X. Qiao、Kap‐Sun Yeung、William R. Ewing、Jin‐Quan Yu
DOI:10.1002/anie.202002865
日期:2020.8.10
to promote ortho‐C−H metalation. Based upon this reactivity, we employed an activated norbornene that traps the ortho‐palladation intermediate and is then relayed to the meta position, leading to meta‐selective C−H arylation of fluoroarenes. Deuterium experiment suggests that this meta‐arylation is initiated by ortho C−H activation and the catalytic cycle is terminated by C‐2 protonation. A dual‐ligand
已知氟可促进邻位‐C−H 金属化。基于这种反应性,我们采用了一种活化的降冰片烯来捕获邻位钯化中间体,然后转移到间位,从而导致氟芳烃的间位选择性C−H 芳基化。氘实验表明,这种元芳基化是由邻位C-H 激活引发的,催化循环由 C-2 质子化终止。双配体系统对于观察到的高反应性和位点选择性至关重要。将这种方法应用于简单的苯或其他芳烃也可以提供具有良好收率和位点选择性的芳基化产物。