反应详情

温度

40 °C

A suspension of 5-bromo-2-bromomethyl-pyridine (1.34 g, 5.34 mmol), thiomorpholine 1,1-dioxide (0.860 g, 6.36 mmol), and potassium carbonate (1.49 g, 10.8 mmol) in acetone (15.0 mL) was stirred at 40° C. overnight. The mixture was cooled to room temperature and the volatiles were evaporated. The residue was partitioned between EtOAc (100 mL) and saturated aqueous ammonium chloride (50 mL). The organic layer was dried over sodium sulfate, filtered, and concentrated under reduced pressure. Purification by silica gel chromatography using a gradient of 0-100% EtOAc/hex as the eluting solvent to obtain 4-(5-bromo-pyridin-2-ylmethyl)-thiomorpholine 1,1-dioxide as a white solid (1.37 g, 84%). m.p.=129-131° C.; LCMS (m/e) 305 (M+H); 1H-NMR (CDCl3, 400 MHz) δ 8.64 (d, 1H, J=2.3 Hz), 8.82 (dd, 1H, J=2.3 and 8.3 Hz), 7.29 (d, 1H, J=8.3 Hz), 3.78 (s, 2H), 3.13-3.02 (m, 8H).

1. temperatureThe mixture was cooled to room temperature
2. customthe volatiles were evaporated
3. customThe residue was partitioned between EtOAc (100 mL) and saturated aqueous ammonium chloride (50 mL)
4. dry with materialThe organic layer was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customPurification by silica gel chromatography