Directing Group Enables Electrochemical Selectively <i>Meta</i>-Bromination of Pyridines under Mild Conditions
作者:Yanwei Wu、Shanghui Xu、Hong Wang、Dongxu Shao、Qiqi Qi、Yi Lu、Li Ma、Jianhua Zhou、Wei Hu、Wei Gao、Jianbin Chen
DOI:10.1021/acs.joc.1c00923
日期:2021.11.19
use of catalysts and oxidants, a facile and sustainable electrochemical bromination protocol was developed. By introducing the directing groups, the regioselectivity of pyridine derivatives could be controlled at the meta-position utilizing the inexpensive and safe bromine salts at room temperature. A variety of brominated pyridine derivatives were obtained in 28–95% yields, and the reaction could be
在不使用催化剂和氧化剂的情况下,开发了一种简便且可持续的电化学溴化方案。通过引入定位基团,吡啶衍生物的区域选择性可以在被控制的元利用廉价且安全的溴盐在室温下位上。以 28-95% 的产率获得了多种溴化吡啶衍生物,并且该反应可以很容易地以克级规模进行。通过结合安装和去除导向基团,可以验证吡啶间溴化的概念。