反应详情

Acetic anhydride (79.6 g, 0.76 mol, 1.46 equiv) was added over 1.5 hours to the mixture of 2-amino-5-nitrophenol (80 g, 0.52 mol, 1.00 equiv) and acetic acid (320 ml, 5.2 mol, 10 equiv) at 60° C. After 1 hour, additional acetic anhydride was added (7.4 g, 0.071 mol, 0.137 equiv). After another 1 hour, the mixture was cooled and diluted with 200 ml of water. Solid was formed and collected by filtration and washed with water and heptane. The solid was dried in a vacuum oven to give the title compound 94 g. MS (ESI) m/z: 197 (M+1).

1. waitAfter another 1 hour
2. temperaturethe mixture was cooled
3. customSolid was formed
4. filtrationcollected by filtration
5. washwashed with water and heptane
6. customThe solid was dried in a vacuum oven