反应详情

温度

0 °C

3-(Methylsulfonyl)-5-nitro-aniline (4.3 g; 19.89 mmol) was diluted in 60 ml of ethyl acetate and a solution of potassium hydrogen carbonate (219 g, 21.87) in 10 ml of water was added. The reaction mixture was stirred at 0° C. and chloroacetylchloride (2.47 ml; 21.87 mmol) was added dropwise. The reaction mixture was allowed to reach room temperature and stirred for 2 h. Then, the phases were separated. The organic phase was dried on MgSO4 and concentrated under vacuum. The oil obtained was treated with acetone/di-isopropyl ether (1/5) and the solid obtained was filtered. 2.5 g (8.54 mmol; 43% yield) of the desired 2-Chloro-N-(3-methanesulfonyl-5-nitro-phenyl)-acetamide were obtained.

1. customto reach room temperature
2. stirringstirred for 2 h
3. customThen, the phases were separated
4. customThe organic phase was dried on MgSO4
5. concentrationconcentrated under vacuum
6. customThe oil obtained
7. customthe solid obtained
8. filtrationwas filtered