Regioselective 2,2,2-Trifluoroethylation of Imidazopyridines by Visible Light Photoredox Catalysis
2016
Zhu, Mei | Han, Xin | Fu, Weijun | Wang, Zhiqiang | Ji, Baoming | Hao, Xin-Qi | Song, Mao-Ping | Xu, Chen
A visible-light-induced C-3 selective trifluoroethylation of imidazoheterocycles using 1,1,1-trifluoro-2-iodoethane as trifluoroethyl radical sources was developed. The methodology enables the introduction of a trifluoroethyl group in a fast and efficient reaction under mild conditions with excellent regioselectivities and high functional group tolerance.
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