反应详情

温度

70 °C

(2,4-Dimethylphenyl)boronic acid (3.0 g, 20.0 mmol), ethyl 3-bromobenzoate (4.3 g, 18.8 mmol) and cesium carbonate (9.8 g, 30.0 mmol) were added to a mixed solvent of ethanol (20 mL) and toluene (80 mL). After argon substitution, tetrakis(triphenylphosphine)palladium(0) (0.30 g, 0.26 mmol) was added, and the reaction mixture was stirred under an argon atmosphere at 70° C. for 18 hr. The reaction mixture was cooled, and the insoluble material was filtered through celite, and the filtrate was concentrated under reduced pressure. The obtained residue was subjected to silica gel column chromatography (ethyl acetate:hexane=1:10) to give the title compound (5.0 g, yield 100%) as a colorless oil.

1. temperatureThe reaction mixture was cooled
2. filtrationthe insoluble material was filtered through celite
3. concentrationthe filtrate was concentrated under reduced pressure