反应详情

A suspension of tert-butyl {2-fluoro-5-[(5-nitropyridin-2-yl)oxy]phenyl}carbamate (3.49 g, 10 mmol) and 10% palladium-carbon (1.0 g) in methanol (20 mL)-tetrahydrofuran (20 mL) was vigorously stirred at room temperature overnight under a hydrogen atmosphere. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The to residue was poured into water (200 mL), and the mixture was extracted with ethyl acetate (100 mL×2). The ethyl acetate layers were combined and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The residue was triturated with diethyl ether to give the title compound (3.00 g, 94%) as a colorless powder.

1. filtrationThe insoluble material was filtered off
2. concentrationthe filtrate was concentrated under reduced pressure
3. additionThe to residue was poured into water (200 mL)
4. extractionthe mixture was extracted with ethyl acetate (100 mL×2)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationThe insoluble material was filtered off
7. concentrationthe filtrate was concentrated under reduced pressure
8. customThe residue was triturated with diethyl ether