反应详情

温度

100 °C

(4-(Benzyloxy)-2,6-dimethylphenyl)boronic acid 12b (256 mg, 1 mmol), 2-fluoro-5-bromo-benzaldehyde (203 mg, 1 mmol), 2M aqueous sodium carbonate solution (1 mL, 2 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (37 mg, 0.08 mmol) and tris(dibenzylideneacetone)dipalladium (18 mg, 0.02 mmol) were dissolved in 3 mL of a mixture of the solvents ethylene glycol dimethyl ether and toluene (V/V=1:2). The reaction mixture was heated at 100° C. for 2 hours, and then at 120° C. for 0.5 hours under microwave conditions. The resulting mixture was mixed with 10 mL of water and extracted with ethyl acetate (10 mL×3). The combined organic extracts were washed with saturated sodium chloride solution (30 mL), dried with anhydrous magnesium sulphate, and filtered. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography with elution system B to obtain the title compound 4′-(benzyloxy)-4-fluoro-2′,6′-dimethylbiphenyl-3-carbaldehyde 18a (390 mg, yield 58.4%) as a colorless slime.

1. extractionextracted with ethyl acetate (10 mL×3)
2. washThe combined organic extracts were washed with saturated sodium chloride solution (30 mL)
3. dry with materialdried with anhydrous magnesium sulphate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated under reduced pressure
6. customThe residue was purified by silica gel column chromatography with elution system B