反应详情

温度

80 °C

4-Fluoronitrobenzene (0.28 mL, 2.65 mmol), 4-hydroxy-pyrrolidine-2-carboxylic acid ethyl ester (419 mg, 2.65 mmol), and sodium bicarbonate (222 mg, 2.65 mmol) were dissolved in 5 mL dry DMF and heated to 80° C. After 24 h at this temperature, the reaction was cooled and water and ethyl acetate were added. The organic phase washed with brine, dried (MgSO4), and concentrated. Flash chromatography (65-75% ethyl acetate/hexanes) gave 260 mg (35% yield) of the desired product 1H NMR (CDCl3, 500 MHz) 8.15 (d, J=9.3 Hz, 2H), 6.54 (d, J=9.3 Hz, 2H), 4.60 (m, 1H), 4.41 (d, J=9.2 Hz, 1H), 4.31 (dq, J=10.8, 7.1 Hz, 1H), 4.29 (dq, J=10.8, 7.1 Hz, 1H), 3.73 (dt, J=11.0, 1.2 Hz, 1H), 3.70 (dd, J=11.0, 4.2 Hz, 1H), 2.51 (ddd, J=14.2, 9.2, 4.2 Hz, 1H), 2.35 (dd, J=14.2, 1.2 Hz, 1H), 1.34 (t, J=7.1 Hz, 3H).

1. temperaturethe reaction was cooled
2. washThe organic phase washed with brine
3. dry with materialdried (MgSO4)
4. concentrationconcentrated