反应详情

A mixture of 10 g of 3-acetamido-2,4-dimethylphenol (55.9 mmol), 250 ml of concentrated sulfuric acid and 200 ml of ethanol was refluxed for 30 minutes and, then, concentrated under reduced pressure. The residue was dissolved in water and the solution was made alkaline with ammonia water and extracted with ether. The ether layer was washed with a saturated aqueous solution of sodium chloride, dried over magnesium sulfate (dehydration) and concentrated under reduced pressure. The residue was recrystallized from ethanolhexane to give 5.3 g (69%) of the title compound as colorless plates, m.p. 177°-179° C.

1. temperaturewas refluxed for 30 minutes
2. concentrationconcentrated under reduced pressure
3. dissolutionThe residue was dissolved in water
4. extractionextracted with ether
5. washThe ether layer was washed with a saturated aqueous solution of sodium chloride
6. dry with materialdried over magnesium sulfate (dehydration)
7. concentrationconcentrated under reduced pressure
8. customThe residue was recrystallized from ethanolhexane