反应详情

温度

0 °C

To a stirred mixture of ethyl 2-aminoacetate hydrochloride (1.568 g, 11.24 mmol) in dichloromethane (9 mL) and water (2 mL) at 0° C. was added a solution of 2,4-dibromobutanoyl chloride (3.0 g, 10.21 mmol) in dichloromethane (2 mL). A solution of sodium hydroxide in water (11.5 M, 2 mL) was then added slowly. The reaction was stirred 1 hour at 0° C. and then 15 minutes at room temperature. The reaction was then treated with dichloromethane (40 mL) and water (25 mL). The layers were separated, and the organic layer was brine-washed, dried over sodium sulfate, filtered, concentrated down, and dried under vacuum to afford the crude title racemic compound (3.165 g in 90% purity, 84% yield) as a clear oil. 1H NMR (400 MHz, chloroform-d) δ ppm 6.81 (br s, 1H), 4.58 (dd, J=8.84, 4.80 Hz, 1H), 4.21-4.31 (m, 2H), 4.07 (d, J=5.56 Hz, 2H), 3.51-3.63 (m, 2H), 2.62-2.75 (m, 1H), 2.44-2.57 (m, 1H), 1.28-1.36 (m, 3H).

1. custom15 minutes
2. customat room temperature
3. customThe layers were separated
4. washwashed
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated down
8. customdried under vacuum
9. customto afford the crude title racemic compound (3.165 g in 90% purity, 84% yield) as a clear oil