Heterogeneous Chitosan@Copper(II)-Catalyzed Remote Trifluoromethylation of Aminoquinolines with the Langlois Reagent by Radical Cross-Coupling
作者:Chao Shen、Jun Xu、Beibei Ying、Pengfei Zhang
DOI:10.1002/cctc.201601068
日期:2016.12.7
The first remote C−H trifluoromethylation of N‐(quinolin‐8‐yl)benzamide derivatives was accomplished with a user‐friendly chitosan‐based heterogeneous copper catalyst under mild conditions. The position‐selective C−H activation protocol afforded the corresponding coupling products in good to excellent yields with excellent reusability of the catalyst by using the low‐costing and stable Langlois reagent
N-(喹啉-8-基)苯甲酰胺衍生物的第一个远程CH-H三氟甲基化反应是在温和的条件下使用易于使用的壳聚糖基异质铜催化剂完成的。通过使用低成本且稳定的Langlois试剂(CF 3 SO 2 Na)作为“ CF 3 ”来源,位置选择性的C H活化方案以良好的产率提供了出色的产率,并具有优异的催化剂可重复使用性。此外,控制实验表明,单电子转移过程在异质C-CF 3交叉耦合中起着至关重要的作用。