反应详情

温度

80 °C

A mixture of 4-(4-aminophenyl)butyric acid (0.20 g, 1.12 mmol), cyclobutanone (0.17 mL, 2.23 mmol) and TMSCN (0.30 mL, 2.23 mmol) was heated to 80° C. and stirred for 13 h. To the medium was added ethyl acetate (2×30 mL) and then washed with water (2×30 mL). The organic layer was dried over MgSO4 and concentrated and the residue was purified with silica gel column chromatography (dichloromethane:acetone, 9:1) to give 4-[4-(1-Cyanocyclobutylamino)phenyl]butanoic acid (Formula 50) (0.21 g, 74%) as a yellowish solid. 1H NMR δ 7.06 (d, 2H, J=8.6 Hz), 6.59 (d, 2H, J=8.6 Hz), 2.75-2.83 (m, 2H), 2.59 (t, 2H, J=7.5 Hz), 2.37 (t, 2H, J=7.5 Hz), 2.33-2.42 (m, 2H), 2.11-2.28 (m, 2H), 1.92 (p, 2H, J=7.5 Hz).

1. washwashed with water (2×30 mL)
2. dry with materialThe organic layer was dried over MgSO4
3. concentrationconcentrated
4. customthe residue was purified with silica gel column chromatography (dichloromethane:acetone, 9:1)