反应详情

Into a 100-ml four-necked flask provided with a reflux condenser, a stirrer and a thermometer were fed 0.95 g (17.0 mmol) of an iron powder, 0.11 g (1.0 mmol) of 98% sulfuric acid, 15 ml of water and 1.62 g (6.0 mmol) of 3-bromo-2-difluoromethoxynitrobenzene. The mixture was heated on an oil bath and refluxed for 2 hours. After the completion of a reaction, azeotropic distillation was conducted while 220 ml of water was added gradually. The distillate was subjected to extraction two times each using 100 ml of ether. The ether layer was dried over anhydrous sodium sulfate and then subjected to distillation. The residue was distilled under vacuum to obtain 0.94 g of 3-bromo-2-difluoromethoxyaniline (yield: 65.4%, purity: 98.5%).

1. customInto a 100-ml four-necked flask provided with a reflux condenser, a stirrer
2. temperatureThe mixture was heated on an oil bath
3. temperaturerefluxed for 2 hours
4. customAfter the completion of a reaction, azeotropic distillation
5. additionwas added gradually
6. extractionThe distillate was subjected to extraction two times each using 100 ml of ether
7. dry with materialThe ether layer was dried over anhydrous sodium sulfate
8. distillationsubjected to distillation
9. distillationThe residue was distilled under vacuum