反应详情

温度

-20 °C

At −78° C., NaH (60% in mineral oil; 220 mg, 5.52 mmol, 1.1 eq) is added to a solution of 2-chloro-1H-indole x160 (0.76 g, 5.02 mmol, 1 eq) in dry DMF (50 ml). The temperature is raised to −20° C. during 20 minutes, then 1-(chloromethyl)-4-propylpyrrolidin-2-one x63 (0.76 g, 5.02 mmol, 1 eq) dissolved in DMF (10 ml) is added drop wise. After 2 hours at room temperature, water (50 ml) is added. The aqueous layer is extracted with CH2Cl2 (3×30 ml). The combined organic layers are dried on anhydrous MgSO4, filtered off and concentrated under reduced pressure to obtain a liquid that is purified on silicagel (AcOEt/Benzine 1/9) yielding 1-[(2-chloro-1H-indol-1-yl)methyl]-4-propylpyrrolidin-2-one 274 as a colorless liquid (605 mg).

1. additionis added drop wise
2. extractionThe aqueous layer is extracted with CH2Cl2 (3×30 ml)
3. dry with materialThe combined organic layers are dried on anhydrous MgSO4
4. filtrationfiltered off
5. concentrationconcentrated under reduced pressure
6. customto obtain a liquid that
7. customis purified on silicagel (AcOEt/Benzine 1/9)