反应详情

To a solution of N-{5-[(2-amino-1,3-benzothiazol-6-yl)oxy]-2-methylphenyl}-3-(1-cyanocyclopropyl)benzamide (300 mg, 0.681 mmol) in N,N-dimethylacetamide (3.0 mL) was added cyclopropanecarbonyl chloride (65 μL, 0.715 mmol), and the mixture was stirred at room temperature for 10 hr. To the reaction mixture was added cyclopropanecarbonyl chloride (30 μL, 0.33 mmol), and the mixture was further stirred at room temperature for 3 hr. The reaction mixture was diluted with ethyl acetate (100 mL), washed with 5% aqueous sodium hydrogencarbonate solution (100 mL) and saturated brine (100 mL), successively, 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 silica gel column chromatography (hexane/ethyl acetate=70/30→0/100), and the obtained solution was concentrated under reduced pressure. The residue was triturated with ethyl acetate/diisopropyl ether to give the title compound (140 mg, 40%) as a colorless solid.

1. stirringthe mixture was further stirred at room temperature for 3 hr
2. washwashed with 5% aqueous sodium hydrogencarbonate solution (100 mL) and saturated brine (100 mL)
3. dry with materialsuccessively, and dried over anhydrous sodium sulfate
4. filtrationThe insoluble material was filtered off
5. concentrationthe filtrate was concentrated under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate=70/30→0/100)
7. concentrationthe obtained solution was concentrated under reduced pressure
8. customThe residue was triturated with ethyl acetate/diisopropyl ether