反应详情

温度

0 °C

(R)-2-Amino-2-(3-bromo-5-nitro-phenyl)-propan-1-ol (6.27 g, 22.79 mmol) was dissolved in DMF (230 ml) under N2 and K2CO3 (7.87 g, 57 mmol) and DIPEA (3.98 ml, 22.79 mmol) were added. The mixture was cooled to 0° C. and chloro-acetylchloride (2.83 g, 25.07 mmol) was added dropwise. The reaction was stirred at 0° C. for 19 hrs. After completion, the reaction was put between water (2.3 liter) and toluene (2.3 l). The organic phases were washed with water and brine, combined and dried over Na2SO4. Volatiles were removed under reduced pressure. The crude product was purified by automated column chromatography (cyclohexane/ethyl acetate) yielding the title compound as colorless oil. 1H-NMR (360 MHz, DMSO-d6): 8.51 (1H, NH), 8.28 (s, 1H), 8.12 (s, 1H), 7.93 (s, 1H), 5.25 (t, 1H), 4.15 (d, 2H), 3.62 (m, 2H), 1.62 (s, 3H); MS: 351 [(M+H)+].

1. washThe organic phases were washed with water and brine
2. dry with materialdried over Na2SO4
3. customVolatiles were removed under reduced pressure
4. customThe crude product was purified by automated column chromatography (cyclohexane/ethyl acetate)