反应详情

温度

110 °C

To a solution of 5-bromo-2-fluorobenzaldehyde (20 g, 99 mmol) in DMSO (230 mL) and water (70 mL) were added 2-ethylpiperidine (14.4 mL, 108 mmol) and sodium carbonate (20.9 g, 197 mmol). The resulting mixture was heated at 110° C. for 30 hours. The reaction mixture was cooled at RT, diluted with water (1000 mL) and extracted with MTBE (2×500 mL). The organic layers were combined, dried (Na2SO4) and concentrated under reduced pressure. After purification by flash chromatography (silica, pet ether), the title compound was obtained as a yellow oil. 1H NMR (DMSO-d6, 400 MHz) δ 10.15 (1H, s), 7.72 (2H, d), 7.24 (1H, m), 3.11 (2H, m), 2.85 (1H, m), 1.84 (1H, m), 1.34-1.67 (7H, m), 0.64 (3H, t).

1. temperatureThe reaction mixture was cooled at RT
2. extractionextracted with MTBE (2×500 mL)
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated under reduced pressure
5. customAfter purification by flash chromatography (silica, pet ether)