反应详情

温度

60 °C

To a stirred solution of 6-(5-bromo-2-chloro-benzyl)-3,4-dihydro-2H-benzo[1,4]oxazine (8.0 g, 23.66 mmol) in DMF (35 mL) was added potassium carbonate (6.53 g, 47.3 mmol), and benzyl bromide (4.33 mL, 35.50 mmol). The reaction mixture was heated to 60° C. for 8 h, then cooled to room temperature and quenched by the addition of ice-cold water (50 mL). The resulting mixture was extracted with ethyl acetate (3×30 mL), and the combined organic layers were washed with water (50 mL) and brine (50 mL), then dried over sodium sulfate. The sodium sulfate was filtered off and the filtrate was concentrated to crude product which was purified by silica gel column chromatography to furnish 4-benzyl-6-(5-bromo-2-chloro-benzyl)-3,4-dihydro-2H-benzo[1,4]oxazine (7.0 g).

1. temperaturecooled to room temperature
2. customquenched by the addition of ice-cold water (50 mL)
3. extractionThe resulting mixture was extracted with ethyl acetate (3×30 mL)
4. washthe combined organic layers were washed with water (50 mL) and brine (50 mL)
5. dry with materialdried over sodium sulfate
6. filtrationThe sodium sulfate was filtered off
7. concentrationthe filtrate was concentrated to crude product which
8. customwas purified by silica gel column chromatography