2-(6-Bromopyridin-2-yl)acetonitrile → 2-(6-Bromopyridin-2-yl)-4-{[tert-butyl(dimethyl)silyl]oxy}butanenitrile

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(6-Bromopyridin-2-yl)acetonitrile (Example 235, Step 1) (500 mg, 2.54 mmol) was dissolved in THF (10 mL) and cooled to −78° C. LHMDS (1.0 M in THF, 3.05 ml, 3.05 mmol) was added dropwise, and the solution was maintained at −78° C. for 20 minutes. A solution of (2-bromoethoxy)-tert-butyldimethylsilane (600 μL, 2.79 mmol) in THF (5.0 mL) was added dropwise over 5 minutes. The resulting mixture was maintained at −78° C. for 2 hours and warmed to room temperature overnight. The solution was then diluted with water and extracted with EtOAc (2×). The combined organic layers were washed with brine, dried over MgSO4, filtered and evaporated. Silica gel chromatography (0-15% EtOAc/hexanes) afforded the title compound as a colorless oil.

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