反应详情

To a solution of sodium borohydride (3.38 g, 100 mmol) in ethanol (60 mL) was added dropwise methanol (40 mL) under ice-cooling, and N-(5-{[2-(acetylamino) [1,3]thiazolo[5,4-b]pyridin-5-yl]oxy}-4-chloro-2-fluorophenyl)-2,2,2-trifluoroacetamide (2.16 g, 4.81 mmol) was added in portions thereto under ice-cooling. The reaction mixture was stirred at room temperature for 1 hr, and poured into water (400 mL), and the mixture was extracted with ethyl acetate (200 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 obtained residue was washed with diethyl ether, collected by filtration, and dried under reduced pressure to give the title compound (3.26 g, 68%) as white powder crystals.

1. temperaturecooling
2. temperatureunder ice-cooling
3. extractionthe mixture was extracted with ethyl acetate (200 mL×2)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationThe insoluble material was filtered off
6. concentrationthe filtrate was concentrated under reduced pressure
7. washThe obtained residue was washed with diethyl ether
8. filtrationcollected by filtration
9. customdried under reduced pressure