反应详情

To a two-layer solution of 3-amino-4-methylphenol (3.25 g, 26.4 mmol) in tetrahydrofuran (20 mL)/1N aqueous sodium hydrogen carbonate solution (39 mL) was added a solution of 3-(1-cyano-1-methylethyl)benzoyl chloride synthesized above in tetrahydrofuran (20 mL), and the mixture was stirred at room temperature for 3 hr. The aqueous layer was separated, and extracted with ethyl acetate (100 mL). The combined organic layer was washed with 5% aqueous sodium hydrogen carbonate solution (50 mL) and saturated brine (50 mL), and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was recrystallized from ethyl acetate (45 mL)/hexane (45 mL) to give the title compound (5.95 g, 77%) as a colorless powder.

1. customThe aqueous layer was separated
2. extractionextracted with ethyl acetate (100 mL)
3. washThe combined organic layer was washed with 5% aqueous sodium hydrogen carbonate solution (50 mL) and saturated brine (50 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationThe insoluble material was filtered off
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe obtained residue was recrystallized from ethyl acetate (45 mL)/hexane (45 mL)