反应详情

温度

22 °C

Add sodium hydride (60% dispersion in mineral oil) (3.5 g, 87.3 mmol) to a 0° C. solution of 7-vinylindole (5.0 g, 34.9 mmol) in 140 mL of dimethylformamide. Warm the resulting mixture to 20-24° C. and stir an additional 30 minutes. Add 5-bromo-1-pentene (20 mL, 175 mmol) dropwise and stir for 3 hours. Pour the reaction mixture into a mixture of 150 mL of water and 150 mL of ethyl acetate. Wash the aqueous layer with ethyl acetate (3×100 mL). Combine the organic layers, wash with saturated aqueous sodium chloride, dry over sodium sulfate, filter, and concentrate under reduced pressure. Subject the residue to silica gel chromatography, eluting with 5-10% ethyl acetate in hexanes. Combine fractions containing product and concentrate them under reduced pressure to provide the desired compound as a clear oil (5.39 g, 73%).

1. additionPour the reaction mixture
2. washWash the aqueous layer with ethyl acetate (3×100 mL)
3. washCombine the organic layers, wash with saturated aqueous sodium chloride
4. dry with materialdry over sodium sulfate
5. filtrationfilter
6. concentrationconcentrate under reduced pressure
7. washeluting with 5-10% ethyl acetate in hexanes
8. additionCombine fractions containing product
9. concentrationconcentrate them under reduced pressure