The ring-opening of epoxides with potassium trifluoroborates proceeds smoothly in the presence of trifluoroacetic anhydride under metal-free conditions. The reactions are regioselective and afford a single diastereomer. Both electron-rich and electron-poor aryltrifluoroborates are tolerated.
S. Roscales and A. G. Csákÿ, Chem. Commun., 2014, 50, 454 DOI: 10.1039/C3CC47360K
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