反应详情

温度

0 °C

NaH (37 mmol, 2 equiv.) was taken up in DMF (25 ml) and cooled to 0° C. 6-Nitro-1H-indole (18.5 mmol, 1 equiv.) was added in portions, and the mixture was stirred for 1 h at 25° C. The reaction mixture was cooled to 0° C. again, ethyl bromoacetate (22.22 mmol, 1.2 equiv.) was added dropwise, and the mixture was stirred for 2 h at 25° C. The reaction mixture was then poured into ice-water and extracted with ethyl acetate (2×100 ml). The combined organic phases were washed with sat. NaCl solution (30 ml), dried over Na2SO4 and concentrated under reduced pressure. The product was crystallized from hexane and was used in the next step without being purified further. Yield: 57%

1. temperatureThe reaction mixture was cooled to 0° C. again
2. stirringthe mixture was stirred for 2 h at 25° C
3. extractionextracted with ethyl acetate (2×100 ml)
4. washThe combined organic phases were washed with sat. NaCl solution (30 ml)
5. dry with materialdried over Na2SO4
6. concentrationconcentrated under reduced pressure
7. customThe product was crystallized from hexane
8. customwithout being purified further