A Cu(OAc)2-mediated C-Hamidation and amination of arenes and heteroarenes has been developed using a readily removable directing group. A wide range of sulfonamides, amides, and anilines function as amine donors in this reaction. Heterocycles present in both reactants are tolerated, making this a broadly applicable method for the synthesis of a family of inhibitors including 2-benzamidobenzoic acids
aliphatic olefins are often found to be unreactive in conventional alkenylation reactions. To address this problem, a cobalt catalyzed allylic selective dehydrogenative Heck reaction with internal aliphatic olefins has been developed. The method is highly regio- and stereoselective, the conditions are mild and a wide variety of functional groups can be tolerated. Remarkably, both internal and terminal aliphatic
A Cu(II)-mediated ortho-C–H hydroxylation using a removable directinggroup has been developed. The reaction exhibits considerable functional group tolerance. The use of O2 as an oxidant is crucial for the reactivity. Water is also found to significantly improve this reaction.
Amide-Oxazoline Directed <i>ortho</i>
-C-H Nitration Mediated by Cu<sup>II</sup>
作者:Tian-Hong Gao、Chun-Meng Wang、Kai-Xiang Tang、Yun-Gen Xu、Li-Ping Sun
DOI:10.1002/ejoc.201900117
日期:2019.5.26
The first ortho‐C–H nitration using amide‐oxazoline as the directing group has been reported. The reactions utilize simple and readily available nitro source and proceed under Cu(II) mediated conditions.
An efficient Cu-catalyzed C–H alkenylation with acyclic and cyclic vinyl boronates was realized for the first time under mild conditions. The scope of the vinyl borons and the compatibility with functional groups including heterocycles are superior than Pd-catalyzed C–H coupling with vinyl borons, providing a reliable access to multisubstituted alkenes and dienes. Subsequent hydrogenation of the product