Metal‐free, Visible‐Light‐Mediated Direct Csp
<sup>2</sup>
−H Radical Mono‐ and Bis‐trifluoromethylation of Coumarins and Bioactivity Evaluation
作者:Xiang Yu、Peng Dai、Yu‐Chuan Zhu、Peng Teng、Wei‐Hua Zhang、Chao Deng
DOI:10.1002/cctc.201801332
日期:2018.11.22
A clean, transition metal‐ and oxidant‐free photochemical protocol was described for the direct trifluoromethylation of coumarins with Togni reagent. The reaction proceeded smoothly under mild condition to afford regioselective 3‐trifluoromethyl coumarins, moreover novel bis‐trifluoromethylated coumarins were formed. Preliminary bioactivity evaluation on some products showed potential antifungal activities