反应详情

To a solution of N-[6-(3-amino-4-methylphenoxy)imidazo[1,2-b]pyridazin-2-yl]cyclopropanecarboxamide (210 mg, 0.65 mmol) in N,N-dimethylacetamide (5 mL) was added a solution of 1-tert-butyl-3-methyl-1H-pyrazole-5-carbonylchloride (160 mg, 0.78 mmol) in N,N-dimethylacetamide (1 mL), and the mixture was stirred at room temperature for 30 min. Ethyl acetate/tetrahydrofuran and saturated aqueous sodium hydrogencarbonate solution were added to the mixture, the aqueous layer was extracted with ethyl acetate/tetrahydrofuran (×4). Combined organic layer was washed with water and saturated brine, dried over anhydrous sodium sulfate, and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=40/60→90/10) to give the title compound (14 mg, 4%) as a white solid.

1. extractionthe aqueous layer was extracted with ethyl acetate/tetrahydrofuran (×4)
2. washCombined organic layer was washed with water and saturated brine
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationfiltrated
5. concentrationThe filtrate was concentrated under reduced pressure
6. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=40/60→90/10)