反应详情

A solution of 3,4,5-triethoxybenzoic acid (20.0 g, 78.7 mmol) in acetic acid (68 mL) was stirred at 15° C., and concentrated nitric acid (d 1.38)(34 mL, 750 mmol) was added. After stirring at room temperature for 1 hour, the reaction mixture was poured into ice water and the mixture was extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium hydrogencarbonate and brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield 3,4,5-triethoxy-1-nitrobenzene as a colorless oil (12.9 g, yield: 64%).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with a saturated aqueous sodium hydrogencarbonate and brine
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by column chromatography on silica gel