反应详情

温度

120 °C

Under an argon atmosphere, 1-bromo-2-chloro-4-methoxybenzene (44.3 g) was dissolved in toluene (220 ml), ethyl 2-(4,4,5,5-tetramethyl[1,3,2]dioxaborolan-2-yl)benzoate (60.8 g), water (132 ml), sodium hydrogen carbonate (33.6 g) and dichlorobis(triphenylphosphine)palladium(II) (2.8 g) were added, and the mixture was stirred at an oil bath temperature of 120° C. for 7 hr. To the reaction mixture was added ethyl 2-(4,4,5,5-tetramethyl[1,3,2]dioxaborolan-2-yl)benzoate (5.2 g), and the mixture was further stirred for 2 hr. The reaction mixture was cooled to room temperature, toluene (100 ml) and water (200 ml) were added, and the mixture was stirred overnight. To the reaction mixture was added activated carbon (3 g), and the mixture was further stirred for 1 hr. The insoluble material was filtered off through celite, and the insoluble material was washed with toluene (100 ml) and water (200 ml). The obtained filtrates were combined to allow for layer separation. The obtained organic layer was washed with water (100 ml), and the solvent was evaporated to give the title compound (67.7 g).

1. stirringthe mixture was further stirred for 2 hr
2. temperatureThe reaction mixture was cooled to room temperature
3. stirringthe mixture was stirred overnight
4. additionTo the reaction mixture was added activated carbon (3 g)
5. stirringthe mixture was further stirred for 1 hr
6. filtrationThe insoluble material was filtered off through celite
7. washthe insoluble material was washed with toluene (100 ml) and water (200 ml)
8. customto allow for layer separation
9. washThe obtained organic layer was washed with water (100 ml)
10. customthe solvent was evaporated