反应详情

温度

25 °C

Ethyl 3-chloro-1H-indole-2-carboxylate (19.28 mmol, 1.0 equiv.) was dissolved in THF-MeOH—H2O (2:1:1; 85 ml); LiOH.H2O (57.84 mmol, 3.0 equiv.) was added at 0° C. and the mixture was stirred for 12 h at 25° C. The solvent was reduced under reduced pressure, and the residue was taken up in water (50 ml), adjusted to pH 3 with 1 M HCl and extracted with ethyl acetate (2×100 ml). The combined organic phases were dried over Na2SO4 and concentrated under reduced pressure, and then the product was crystallized with hexane. Yield: 82%

1. extractionextracted with ethyl acetate (2×100 ml)
2. dry with materialThe combined organic phases were dried over Na2SO4
3. concentrationconcentrated under reduced pressure
4. customthe product was crystallized with hexane