反应详情

温度

90 °C

To a solution of (E)-styrylboronic acid (289 mg, 1.95 mmol) in mixed solution of dioxane and water (4:1, 15 mL) were added tert-butyl 4-bromobenzoate (500 mg, 1.95 mmol), tetrakis(triphenylphosphine)palladium (225 mg, 0.2 mmol) and sodium carbonate (622 mg, 5.9 mmol). The mixture was stirred at 90° C. under nitrogen atmosphere for 18 hours. Once start material has been consumed, the mixture was concentrated to give a residue and the residue was purified by column chromatography (silica gel, petroleum ether/ethyl acetate=25:1) to give (E)-tert-butyl 4-styrylbenzoate (0.1 g, 18%). The product was used for the next step directly without further purification.

1. customOnce start material has been consumed
2. concentrationthe mixture was concentrated
3. customto give a residue
4. customthe residue was purified by column chromatography (silica gel, petroleum ether/ethyl acetate=25:1)