反应详情

Acetic anhydride (7.lml) was added to a suspension of 4-amino-2,6-dichlorophenol (5.34 g) in-water (50 ml). The mixture was stirred at reflux for 2 hours. The reaction mixture was cooled to ambient temperature and the crude product was collected by filtration, washed with water and then washed with pentane to give 4-acetamido-2,6-dichlorophenol as a solid (5.6 g), m.p. 151°-152°; NMR ([CD3 ]2SO): 2.0(3H,s), 7.58(2H,s) and 9.92(2H,br s); m/z 220 (M+H).

1. temperatureat reflux for 2 hours
2. filtrationthe crude product was collected by filtration
3. washwashed with water
4. washwashed with pentane