反应详情

温度

80 °C

After dissolving 7-bromo-2-ethylpyrazolo[1,5-a]pyridine (300 mg) in ethanol (2 mL) and toluene (4 mL), 2,4-dichlorophenylboric acid (508 mg), tetrakis(triphenylphosphine)palladium (0) complex (154 mg) and 2M aqueous sodium carbonate (1.33 mL) were added and the mixture was heated and stirred at 80° C. for 3 hours under a nitrogen stream. Water was added to the reaction mixture, extraction was performed with ethyl acetate and the organic layer was washed with brine. After drying over anhydrous magnesium sulfate and filtration, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (380 mg) was obtained from the n-hexane:ethyl acetate (100:1) fraction as a light yellow oil.

1. additionwere added
2. temperaturethe mixture was heated
3. washthe organic layer was washed with brine
4. dry with materialAfter drying over anhydrous magnesium sulfate and filtration
5. concentrationthe solvent was concentrated under reduced pressure
6. customthe residue was purified by silica gel column chromatography