Ruthenium(II)-Catalyzed Regioselective C-8 Hydroxylation of 1,2,3,4-Tetrahydroquinolines
作者:Changjun Chen、Yixiao Pan、Haoqiang Zhao、Xin Xu、Zhenli Luo、Lei Cao、Siqi Xi、Huanrong Li、Lijin Xu
DOI:10.1021/acs.orglett.8b02926
日期:2018.11.2
Ru(II)-catalyzed chelation-assisted highly regioselective C8-hydroxylation of 1,2,3,4-tretrahydroquinolines has been developed. Various 1,2,3,4-tetrahydroquinolines underwent smooth C8–H hydroxylation with cheap and safe K2S2O8 as the oxidant and oxygen source to furnish the corresponding products in good to excellent yields with high tolerance of the functional groups. The choice of a readily installable
已经开发了Ru(II)催化的1,2,3,4-四氢喹啉的螯合辅助的高区域选择性C8-羟基化反应。各种1,2,3,4-四氢喹啉经过顺畅的C8–H羟基化反应,并以廉价且安全的K 2 S 2 O 8作为氧化剂和氧源,以高收率和高官能度耐受性提供了相应的产品。选择易于安装和拆卸的N-嘧啶导向基团是催化的关键。机理研究表明六元钌循环中间体参与了催化循环。该方法还可以扩展到其他(杂)芳烃CH键的直接羟基化反应。