Mn-Mediated Electrochemical Trifluoromethylation/C(sp<sup>2</sup>)–H Functionalization Cascade for the Synthesis of Azaheterocycles
作者:Zhenxing Zhang、Lei Zhang、Yang Cao、Feng Li、Guangcan Bai、Guoquan Liu、Yang Yang、Fanyang Mo
DOI:10.1021/acs.orglett.8b04010
日期:2019.2.1
A general electrohemical strategy for the combined trifluoromethylation/C(sp(2))-H functionalization using Langlois' reagent as the CF3 source under oxidant-free conditions was developed. Using Mn salts as the redox mediator, this method provides an efficient and sustainable I means to access a variety of functionalized heterocycles bearing a CF3 moiety. Detailed mechanistic studies are consistent with the formation of CF3-bound high oxidation state Mn species, suggesting a transition-metal-mediated CF3 transfer mechanism for this trifluoromethylation/C(sp(2))-H functionalization process.