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A highly selective and efficient approach for the direct trifluoromethylthiocyanation of alkenes has been developed using trimethylsilyl isothiocyanate (TMSNCS) as the thiocyanating agent and Togni reagent as the CF3 source in the presence of copper(I) catalyst. Both activated and unactivated alkenes work well to deliver various CF3-containing thiocyanates.
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Liang et al. (2015) studied this question.
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