反应详情

温度

80 °C

1.0 g (3.9 mmol) of 1-benzo[b]thiophen-4-yl-piperazine hydrochloride was suspended in 20 ml of dimethylformamide (DMF), and potassium carbonate (1.3 g, 9.4 mmol) and 4-bromobutyl acetate (0.7 ml, 4.8 mmol) were added thereto. The reaction mixture was stirred at 80° C. for 6 hours, cooled to room temperature, and water was added thereto, and extracted with ethyl acetate. The organic phase was washed with water, dried over sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (dichloromethane:methanol=30:1), and concentrated to dryness under reduced pressure to obtain 4-(4-benzo[b]thiophen-4-yl-piperazin-1-yl)butyl acetate (0.72 g) as light yellow oil.

1. temperaturecooled to room temperature
2. extractionextracted with ethyl acetate
3. washThe organic phase was washed with water
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (dichloromethane:methanol=30:1)
7. concentrationconcentrated to dryness under reduced pressure