反应详情

温度

21 °C

A solution of compound 4-(2-Fluoro-4-nitrophenyl)-N,N-dimethylbutanamide (77) (15 mg, 0.06 mmol), Fe (20 mg, 0.37 mmol) and acetic acid (1 mL) in ethyl acetate (3 mL) was heated under reflux for 2 h. The reaction mixture was allowed to cool to 21° C. and then filtered. The organic layer was concentrated and the residue was purified with silica gel column chromatography (dichloromethane:acetone, 9:1) to give desired 4-(4-Amino-2-fluorophenyl)-N,N-dimethylbutanamide (76) (12 mg, 87%): 1H NMR δ 6.95 (dd, 1H, J=8.3, 8.2 Hz), 6.40 (dd, 1H, J=8.3, 2.2 Hz), 6.35 (dd, 1H, J=11.6, 2.2 Hz), 3.66 (br s, 2H), 2.95 (s, 3H), 2.93 (s, 3H), 2.58 (t, 2H, J=7.4 Hz) 2.30 (t, 2H, J=7.6 Hz) 1.85-1.95 (m, 2H).

1. temperatureunder reflux for 2 h
2. filtrationfiltered
3. concentrationThe organic layer was concentrated
4. customthe residue was purified with silica gel column chromatography (dichloromethane:acetone, 9:1)