Copper-catalyzed selective C5-H bromination and difluoromethylation of 8-aminoquinoline amides using ethyl bromodifluoroacetate as the bifunctional reagent
作者:Changdong Shao、Tianyi Xu、Chen Chen、Qionglin Yang、Chao Tang、Ping Chen、Mingzhu Lu、Zhengsong Hu、Huayou Hu、Tingting Zhang
DOI:10.1039/d3ra00088e
日期:——
A simple and effective method for the copper-catalyzed selective C5-H bromination and difluoromethylation of 8-aminoquinoline amides with ethyl bromodifluoroacetate as the bifunctional reagent was developed. The combination of cupric catalyst and alkaline additive results in a C5-bromination reaction, whereas cuprous catalyst combined with silver additive results in the C5-difluoromethylation reaction
开发了一种以溴二氟乙酸乙酯为双功能试剂,铜催化 8-氨基喹啉酰胺选择性 C5-H 溴化和二氟甲基化的简单有效的方法。铜催化剂与碱性添加剂的组合导致C5-溴化反应,而亚铜催化剂与银添加剂的组合导致C5-二氟甲基化反应。该方法具有广泛的底物范围,可以轻松方便地获得所需的 C5 官能化喹诺酮类化合物,且产率良好至优异。