反应详情

温度

50 °C

N-tert-Butoxycarbonyl-2-benzyloxy-3-nitroaniline (9.37 g, 27.2 mmol) was dissolved in methanol (150 ml), p-toluenesulfonic acid monohydrate (7.84 g, 45.5 mmol) was added thereto and the mixture was stirred at 50° C. for 12 hours. The reaction solution was neutralized with a saturated aqueous solution of sodium bicarbonate and extracted with chloroform. The organic layer was washed with water and a saturated sodium chloride solution successively and dried over anhydrous sodium sulfate and the solvent was evaporated. The residue was purified by a silica gel column chromatography (50 g of silica gel; developing solvent, hexane:ethyl acetate=6:1) to provide 6.44 g (yield 96.9%) of 2-benzyloxy-3-nitroaniline as pale yellowish brown oil.

1. extractionextracted with chloroform
2. washThe organic layer was washed with water
3. dry with materiala saturated sodium chloride solution successively and dried over anhydrous sodium sulfate
4. customthe solvent was evaporated
5. customThe residue was purified by a silica gel column chromatography (50 g of silica gel; developing solvent, hexane:ethyl acetate=6:1)