2,2,2-Trifluoroethanol → 3-Bromo-5-(2,2,2-trifluoroethoxy)pyridine

Participants

Reaction Conditions

Reaction Steps

To a slurry of sodium hydride (60% dispersion in mineral oil, 0.54 g, 14 mmol) in DMF (15 mL) was added commercially available 2,2,2-trifluoroethanol (0.97 mL, 14 mmol) at room temperature. After stirring for 15 minutes, a solution of 3,5-dibromopyridine (3.2 g, 14 mmol) in 5 mL of DMF was added dropwise. The reaction mixture was heated overnight at 70° C. After cooling to room temperature, the reaction was diluted with water and extracted with ethyl acetate. The extracts were dried over magnesium sulfate and the solvent was removed under reduced pressure. The crude product was chromatographed on silica (5% ethyl. acetate/hexanes) to give the title compound (1.6 g, 46% yield) as clear oil. 1H NMR (CDCl3) δ 8.42 (d, 1H, J=1.7 Hz), 8.32 (d, 1H, J=2.5 Hz), 7.46 (m, 1H), 4.42 (m, 2H).

Provenance & Evidence