反应详情

温度

50 °C

A 100 mL round bottomed flask fitted with a nitrogen inlet was charged with (S)-1-(6-bromo-2-methyl-3,4-dihydroquinoxaline-1(2H)-yl)ethanone (0.500 g, 1.858 mmol), 1,2-dichloroethane (20 mL), N,N-diisopropylethylamine (1.0 mL, 5.73 mmol), and furan-2-carbonyl chloride (0.366 mL, 3.72 mmol). The reaction mixture was heated to 50° C. for 2 h with magnetic stirring. After for 2 h, the reaction was washed with 1 N aqueous sodium hydroxide solution (15 mL). The organic layer was removed and set aside. The aqueous layer was washed with 1,2-dichloroethane (20 mL) and the organic layers were combined and concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel (eluting with 2:1 hexanes-ethyl acetate) to afford (S)-1-(6-bromo-4-(furan-2-carbonyl)-2-methyl-3,4-dihydroquinoxaline-1(2H)-yl)ethanone (0.58 g, 86% yield) as a viscous yellow oil. MS (ESI, pos. ion) m/z 417 [M+1]+.

1. customA 100 mL round bottomed flask fitted with a nitrogen inlet
2. washthe reaction was washed with 1 N aqueous sodium hydroxide solution (15 mL)
3. customThe organic layer was removed
4. washThe aqueous layer was washed with 1,2-dichloroethane (20 mL)
5. concentrationconcentrated under reduced pressure
6. customThe crude product was purified by column chromatography on silica gel (eluting with 2:1 hexanes-ethyl acetate)