Tetrahydrofuran → (4-Hydroxy-tetrahydro-pyran-4-yl)-(6-trifluoromethyl-pyridin-3-yl)-acetonitrile

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2-(6-(Trifluoromethyl)pyridin-3-yl)acetonitrile (260 mg, 1.4 mmol) was dissolved in THF (3 mL, 30 mmol) under Ar and cooled at −78° C. A solution of 0.6 Ni sodium bis(trimethylsilyl)amide in toluene (3.49 mL) was added dropwise. After stirring at −78° C. for 4 hours the reaction was allowed to reach −50° C. for 30 minutes. Then tetrahydro-4H-pyran-4-one (0.189 mL, 2.10 mmol) was added dropwise at −60° C. and the reaction was kept at this temperature for 45 minutes. To the reaction was added sat. aq. NH4Cl (10 mL) and it was extracted AcOEt (3×20 mL). The combined organic phases were washed with brine, dried over MgSO4 and concentrated in vacuo. The crude product was purified by flash chromatography to yield 2-(4-Hydroxytetrahydro-2H-pyran-4-yl)-2-(6-(trifluoromethyl)pyridin-3-yl)acetonitrile (189 mg, 0.660 mmol, 47%).

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