Sodium Bicarbonate → 4-(beta-D-glucopyranos-1-yl)-2-(4-pentafluoroethyl-benzyl)-benzonitrile

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A flask charged with 4-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranos-1-yl)-2-(4-iodo-benzyl)-benzonitrile (0.16 g), pentafluoroethyltrimethylsilane (0.14 g), KF (43 mg), CuI (0.16 g), DMF (2 mL) and Ar atmosphere is heated at 60° C. for 24 h. Then, aqueous NaHCO3 solution is added and the resulting mixture is extracted with ethyl acetate. The combined organic phases are dried over sodium sulfate and the solvent is removed. The residue is dissolved in methanol (8 mL) and treated with 4 M KOH solution (0.8 mL). The solution is stirred at room temperature for 1 h and then diluted with aqueous NaHCO3 solution. After removal of the methanol under reduced pressure, the residue is extracted with ethyl acetate, the combined organic extracts are dried and the solvent is removed. The residue is chromatographed on silica gel (dichloromethane/methanol 1:0->8:1).

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