反应详情

A mixture of 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid (150 mg, 0.38 mmol), methyl 4-amino-2-methoxybenzoate (70 mg, 0.38 mmol), 1-methyl-1H-imidazole (126 mg, 1.53 mmol) and EDCI (293 mg, 1.53 mmol) in DMF (3 mL) was stirred for 16 h at room temperature. Ethyl acetate (5 mL) and water (5 mL) were added. The organic layer was separated and the aqueous phase was extracted with ethyl acetate (20 mL). The combined organic phases were washed with brine (10 mL) and dried over Na2SO4. The residue was concentrated and purified by chromatography (silica gel, 200-300 mesh, dichloromethane:MeOH=50:1) to give methyl 4-(3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamido)-2-methoxybenzoate (100 mg, 47%) as brown liquid. LC-MS: [M+H]+, 555.1, tR=1.701 min

1. customThe organic layer was separated
2. extractionthe aqueous phase was extracted with ethyl acetate (20 mL)
3. washThe combined organic phases were washed with brine (10 mL)
4. dry with materialdried over Na2SO4
5. concentrationThe residue was concentrated
6. custompurified by chromatography (silica gel, 200-300 mesh, dichloromethane:MeOH=50:1)