Auxiliary-Directed C(sp<sup>3</sup>
)−H Arylation by Synergistic Photoredox and Palladium Catalysis
作者:Milena L. Czyz、David W. Lupton、Anastasios Polyzos
DOI:10.1002/chem.201704045
日期:2017.10.17
Herein we describe the auxiliary‐directed arylation of unactivated C(sp3)−H bonds with aryldiazonium salts, which proceeds under synergistic photoredox and palladium catalysis. The site‐selective arylation of aliphatic amides with α‐quaternary centres is achieved with high selectivity for β‐methyl C(sp3)−H bonds. This operationally simple method is compatible with carbocyclic amides, a range of aryldiazonium
在这里,我们描述了未活化的C(sp 3)-H键与芳基重氮盐的辅助定向芳基化,该芳基重氮盐在协同的光氧化还原和钯催化下进行。脂族酰胺具有α-季中心的位点选择性芳基化是通过对β-甲基C(sp 3)-H键的高选择性实现的。这种操作简单的方法与碳环酰胺,各种芳基重氮盐兼容,并在环境条件下进行。