反应详情

To a solution of 5-bromo-3-(trifluoromethyl)pyridin-2-ol (6 g, 25 mmol) stirred at rt in THF (5 mL) was added NaH (1.5 g, 37 mmol, 60% in mineral oil). After stirring for 30 min, methyl iodide (7.1 g, 50 mmol) was added. After stirring at rt for 3 h, the reaction mixture was treated with water (100 mL) and extracted with EtOAc (100 mL×3). The combined organic layers were washed with brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (6 g, 97%) as a tan solid. The solid was carried forward without any further purification. 1H NMR (CDCl3, 400 MHz) δ 7.79 (d, J=2.0 Hz, 1H), 7.65 (d, J=2.0 Hz, 1H), 3.60 (s, 3H). LCMS (M+H)+=256.

1. stirringAfter stirring at rt for 3 h
2. extractionextracted with EtOAc (100 mL×3)
3. washThe combined organic layers were washed with brine (100 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo