反应详情

Under nitrogen atmosphere, 30 mL of THF was added to 3.96 g (6.50 mmol, 0.65 equivalent) of (BrZnCH2COOEt.THF)2. Under argon atmosphere, a solution of 1.20 g (10 mmol) of acetophenone in 5 mL of THF was added dropwise while stirring at 0˜5° C. The mixture was stirred at 0˜5° C. for 3 hours. 25 mL of 1N hydrochloric acid was added dropwise at 20° C. or lower, followed by dilution with 50 mL of ethyl acetate. Then, the layers were separated. The organic layer was washed successively with 10 mL (×2) of hydrochloric acid, 20 mL of an aqueous saturated sodium chloride solution, 20 mL (×2) of an aqueous saturated sodium bicarbonate solution, and 20 mL of an aqueous saturated sodium chloride solution. The organic layer was dried with anhydrous magnesium sulfate. Concentration under reduced pressure afforded 1.99 g of the desired product (yield 96%).

1. stirringThe mixture was stirred at 0˜5° C. for 3 hours
2. customThen, the layers were separated
3. washThe organic layer was washed successively with 10 mL (×2) of hydrochloric acid, 20 mL of an aqueous saturated sodium chloride solution, 20 mL (×2) of an aqueous saturated sodium bicarbonate solution, and 20 mL of an aqueous saturated sodium chloride solution
4. dry with materialThe organic layer was dried with anhydrous magnesium sulfate
5. concentrationConcentration under reduced pressure