反应详情

To a stirred solution of (E)-3-((S)-4-pyrrolidin-2-yl-phenyl)-acrylic acid methyl ester hydrochloride (0.3 g, 1.12 mmol) in N,N-dimethylformamide (20 mL) was added sequentially triethylamine (0.5 mL, 3.58 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.24 g, 1.25 mmol), 1-hydroxybenzotriazole (0.17 g, 1.25 mmol) and 2-methylindole-3-acetic acid (0.235 g, 1.24 mmol). The reaction was stirred for 16 h and diluted with dichloromethane, and the solution was washed with a saturated aqueous solution of sodium chloride, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (2% methanol in dichloromethane) to obtain (E)-3-(4-{(S)-1-[2-(2-methyl-1H-indol-3-yl)-acetyl]-pyrrolidin-2-yl}-phenyl)-acrylic acid methyl ester as a colorless oil (0.42 g, 1.03 mmol, 93% yield).

1. washthe solution was washed with a saturated aqueous solution of sodium chloride
2. dry with materialdried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe crude product was purified by silica gel column chromatography (2% methanol in dichloromethane)