反应详情

To a mixture of 1.70 g of 4-(pentafluoroethyl)phenol, 6 ml of acetic acid and 2.0 ml of concentrated sulfuric acid, a mixture of 0.80 g of 69% nitric acid and 1 ml of acetic acid was added dropwise while ice-cooling, and stirred at room temperature for three hours. The reaction mixture was poured into ice water, followed by extraction with ethyl acetate three times. The combined organic layers were washed with water and a saturated sodium chloride solution, dried over sodium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 1.40 g of 4-(pentafluoroethyl)-2-nitrophenol.

1. additionwas added dropwise while ice-
2. temperaturecooling
3. extractionfollowed by extraction with ethyl acetate three times
4. washThe combined organic layers were washed with water
5. dry with materiala saturated sodium chloride solution, dried over sodium sulfate
6. concentrationconcentrated under reduced pressure