反应详情

To a solution of N-{3-[(2-amino[1,3]thiazolo[5,4-b]pyridin-5-yl)oxy]-4-chlorophenyl}-3-(1-cyano-1-methylethyl)benzamide (464 mg, 1.00 mmol) in pyridine (10 mL) was added cyclopropanecarbonyl chloride (181 μL, 2.00 mmol), and the mixture was stirred at room temperature for 12 hr. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with ethyl acetate (50 mL), 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 purified by basic silica gel column chromatography (hexane/ethyl acetate=60/40→0/100), and the obtained solution was concentrated under reduced pressure. The residue was crystallized from ethyl acetate/hexane to give the title compound (246 mg, 46%) as a colorless powder.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additionthe residue was diluted with ethyl acetate (50 mL)
3. washwashed 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 purified by basic silica gel column chromatography (hexane/ethyl acetate=60/40→0/100)
8. concentrationthe obtained solution was concentrated under reduced pressure
9. customThe residue was crystallized from ethyl acetate/hexane