反应详情

To a stirred solution of 1-(5-chloro-2-hydroxy-4-methylphenyl)ethanone (10 g, 54 mmol, from Aldrich) in acetic acid (100 mL) was added N-bromosuccinimide (12 g, 65 mmol) and the resulting mixture was stirred at room temperature for 18 hours. The reaction mixture was concentrated in vacuo, neutralized with saturated sodium bicarbonate and filtered to remove insoluble succinimide. The filtrate was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate, and then concentrated to dryness under reduced pressure. The crude product was recrystallized from a mixture of ethyl acetate and hexane (11.4 g, 80%).

1. concentrationThe reaction mixture was concentrated in vacuo
2. filtrationfiltered
3. customto remove insoluble succinimide
4. extractionThe filtrate was extracted with ethyl acetate
5. washThe combined organic layers were washed with brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated to dryness under reduced pressure
8. customThe crude product was recrystallized from a mixture of ethyl acetate and hexane (11.4 g, 80%)