3-Trifluoromethylated Coumarins and Carbostyrils by Radical Trifluoromethylation of<i>ortho</i>-Functionalized Cinnamic Esters
作者:Slim Chaabouni、Florent Simonet、Alison François、Souhir Abid、Chantal Galaup、Stefan Chassaing
DOI:10.1002/ejoc.201601181
日期:2017.1.10
regioselective synthesis of 3-trifluoromethylated coumarins. The reaction was performed by using the Togni reagent as the CF3 source under mild conditions and showed good functional- group tolerance. The scope of this copper-mediated method was further expanded to the synthesis of 3-trifluoromethylated carbostyrils starting from ortho-aminocinnamic derivatives. Interestingly, a sequential one-pot synthesis of
开发了一种邻羟基肉桂酸酯的三氟甲基化方法,以实现 3-三氟甲基化香豆素的区域选择性合成。该反应采用 Togni 试剂作为 CF3 源,在温和条件下进行,显示出良好的官能团耐受性。这种铜介导的方法的范围进一步扩展到从邻氨基肉桂衍生物开始合成 3-三氟甲基化喹诺酮。有趣的是,进一步开发了从水杨醛开始的 3-三氟甲基化香豆素的连续一锅合成。探索了这种级联反应的机制,发现自由基途径与所得结果一致。