Zinc–Brønsted acid mediated practical hydrotrifluoromethylation of alkenes with CF3Br
Literature Information
Deqian Peng, Wu Fan, Xueqi Zhao, Wei Chen, Yuan Wen, Li Zhang
We report a mild and efficient hydrotrifluoromethylation of alkenes with bromotrifluoromethane (CF3Br) mediated by zinc and a Brønsted acid. This reaction proceeds well with good functional group compatibility and broad substrate scope. Mechanistic studies indicate that the reaction proceeds through a radical pathway, facilitated through the combination of the zinc metal and a Brønsted acid for the single electron reduction of CF3Br to the CF3 radical. Furthermore, the method readily allows the incorporation of deuterium using deuterated carboxylic acid and D2O.
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