反应详情

An oven dried resealable Schlenk tube was purged with argon and charged with palladium acetate (2.2 mg, 0.01 mmol, 0.5 mol %), ligand 2 [Example 1] (5.9 mg, 0.015 mmol, 0.75 mol %), phenylboron dihydroxide (366 mg, 3.0 mmol), and potassium phosphate (850 mg, 4.0 mmol). The tube was purged with argon, and dioxane (6 mL), and 4-chloroanisole (0.24 mL, 2.0 mmol) were added through a rubber septum. The septum was removed, the tube was sealed with a teflon screw cap and the mixture was stirred at room temperature for two minutes, then heated to 100° C. with stirring until the starting aryl chloride had been completely consumed as judged by GC analysis. The reaction mixture was then diluted with ether (40 mL) and poured into a separatory funnel. The mixture was washed with 1M NaOH (40 mL), and the layers were separated. The aqueous layer was extracted with ether (40 mL), and the combined organic extracts were dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The crude material was then purified by flash chromatography on silica gel to give 347 mg (94%) of a white solid.

1. customAn oven dried resealable Schlenk tube
2. customwas purged with argon
3. additionwere added through a rubber septum
4. customThe septum was removed
5. customthe tube was sealed with a teflon
6. customscrew cap
7. temperatureheated to 100° C.
8. stirringwith stirring until the starting aryl chloride
9. customhad been completely consumed
10. additionThe reaction mixture was then diluted with ether (40 mL)
11. additionpoured into a separatory funnel
12. washThe mixture was washed with 1M NaOH (40 mL)
13. customthe layers were separated
14. extractionThe aqueous layer was extracted with ether (40 mL)
15. dry with materialthe combined organic extracts were dried over anhydrous magnesium sulfate
16. filtrationfiltered
17. concentrationconcentrated in vacuo
18. customThe crude material was then purified by flash chromatography on silica gel