反应详情

温度

70 °C

A mixture of 6-chloroimidazo[1,2-b]pyridazine (1536 mg, 10.0 mmol), methyl 2-mercaptobenzoate (1.788 mL, 13.0 mmol), potassium carbonate (4146 mg, 30.0 mmol) and N,N-dimethylformamide (20 mL) was stirred at 70° C. for 18 hr. To the reaction mixture was added methyl 2-mercaptobenzoate (0.963 mL, 7.0 mmol), and the mixture was stirred at 70° C. for 6 hr. The reaction mixture was concentrated under reduced pressure, the residue was diluted with water, and extracted with ethyl acetate. The organic layer was washed with water and concentrated under reduced pressure. The residue was purified by NH silica gel column chromatography (hexane/ethyl acetate=90/10→20/80) and precipitated from diisopropyl ether to give the title compound (663 mg, 2.3 mmol, yield 23%) as a white solid.

1. stirringthe mixture was stirred at 70° C. for 6 hr
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. additionthe residue was diluted with water
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with water
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by NH silica gel column chromatography (hexane/ethyl acetate=90/10→20/80)
8. customprecipitated from diisopropyl ether