反应详情

To a solution of N-{3-[(6-aminopyridin-3-yl)oxy]phenyl}-3-methylpyridine-2-carboxamide (1.84 g, 5.75 mmol) in DMSO (20 mL) was added dropwise with stirring under ice-cooling ethyl isothiocyanatoformate (0.75 mL, 6.35 mmol), and the mixture was stirred at room temperature for 12 hr. The reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (25%→40% ethyl acetate-hexane) to give the title compound (2.00 g, 77%) as a white solid.

1. stirringthe mixture was stirred at room temperature for 12 hr
2. extractionextracted with ethyl acetate
3. washThe organic layer was washed with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltrated
6. concentrationThe filtrate was concentrated under reduced pressure
7. customthe residue was purified by silica gel column chromatography (25%→40% ethyl acetate-hexane)