反应详情

A mixture of 4-bromo-2-fluoro-nitro benzene (34 g, 0.15 mol), N-n-butyl glycine (20 g, 0.15 mol) in ethanol (600 ml), and water (150 ml) was heated to reflux for 6 hours. After cooling to room temperature, the mixture was diluted with 2N sodium hydroxide, extracted with CH2Cl2 and the pH was adjusted to 5 with 1N HCl. The mixture was extracted with CH2Cl2, the CH2Cl2 solution was dried (MgSO4) and evaporated to obtain the crude product (11 g, 22%) as a brown oil, which was used without further purification. 1H-NMR (DMSO-d6) δ 0.84 (t, J=7.30 Hz, 3H), 1.23 (m, 2H), 1.45 (m, 2H), 3.18 (t, J=7.30 Hz, 2H), 3.91 (s, 2H), 7.16 (dd, J=8.68, 1.91 Hz, 1H), 7.40 (d, J=1.94 Hz, 1H), 7.69 (d, J=8.68 Hz, 1H); MS (EI) m/z 331 (M+).

1. temperaturewas heated
2. temperatureto reflux for 6 hours
3. extractionextracted with CH2Cl2
4. extractionThe mixture was extracted with CH2Cl2
5. dry with materialthe CH2Cl2 solution was dried (MgSO4)
6. customevaporated