反应详情

温度

105 °C

A 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 126d (205 mg, 0.665 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (1.0 g, 4.0 mmol), dioxane (16 mL), PdCl2(dppf) (54.3 mg, 0.066 mmol), and potassium acetate (0.39 mg, 4.0 mmol). After bubbling argon through the resulting mixture for 30 minutes, it was stirred at 105° C. for 4 h under argon atmosphere. It was then cooled to room temperature and filtered. The filtrate was evaporated under reduced pressure to afford crude 126e, which was used without further purification. MS: [M+H]+ 275.

1. customA 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
2. customAfter bubbling argon through the resulting mixture for 30 minutes
3. temperatureIt was then cooled to room temperature
4. filtrationfiltered
5. customThe filtrate was evaporated under reduced pressure