反应详情

温度

0 °C

To a stirred solution of 908 mg (6.83 mmol) Cyclopropyl-phenyl-amine (Kang, Sung, Kim, J. Chem. Soc., Chem. Commun., 1987, 897-898) and 690 mg (6.83 mmol, 1 equiv) Et3N in 10 mL DCM is added 1.38 g (6.83 mmol, 1 equiv) Bromoacetyl bromide in 4 mL DCM dropwise over 15 minutes at 0° C. The reaction mixture is stirred 3 h at 0° C., diluted with 30 mL DCM, washed with 1N HCl (30 mL), dried (MgSO4), and concentrated in vacuo. The crude product is purified by flash chromatography on 30 g silica gel eluted successively with EtOAc/Hexanes (1:9, 100 mL), (3:17, 300 mL). Appropriate fractions were combined and concentrated in vacuo to give 948 mg (3.73 mmol) of 2-Bromo-N-cyclopropyl-N-phenyl-acetamide as an amber oil: 1H NMR (CDCl3, 300 MHz) δ7.39 (m, 3H), 7.15 (m, 2H), 3.62 (s, br, 2H), 3.24 (m, 1H), 0.83 (m, 2H), 0.52 (m, 2H); TLC Rf =0.18 (EtOAc/Hexanes, 3:17).

1. washwashed with 1N HCl (30 mL)
2. dry with materialdried (MgSO4)
3. concentrationconcentrated in vacuo
4. customThe crude product is purified by flash chromatography on 30 g silica gel
5. washeluted successively with EtOAc/Hexanes (1:9, 100 mL), (3:17, 300 mL)
6. concentrationconcentrated in vacuo