Abstract

“Intermediate” Lewis acids are efficient catalysts for mesylation of trifluoroethanol (TFE) by mesyl chloride at 80 °C. In the absence of solvent, trifluoroethyl mesylate (TFEMes) is obtained in a chemical yield of 98% with total conversion of TFE. The only coproduct of the reaction, hydrochloric acid, simply distills from the reaction mixture. Distillation of TFEMes allows for recycle of the catalyst without any treatment.

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