反应详情

温度

80 °C

A mixture of tetrakis(triphenylphosphine)palladium(0) (0.20 g, 0.17 mmol), aqueous sodium carbonate (2N aqueous, 8.52 mL, 17.05 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.43 g, 6.82 mmol), and 4-bromo-2-fluoropyridine (1.0 g, 5.68 mmol) in 1,2-dimethoxyethane (25 mL) was placed under argon atmosphere using 3 evacuation/backfill cycles. The mixture was then heated to 80° C. for 16 h then cooled to RT. Ethyl acetate and saturated aqueous ammonium chloride were added and the layers of the resulting biphasic mixture were separated. The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo to give an oil that was purified by silica gel chromatography to give 4-(3,6-dihydro-2H-pyran-4-yl)-2-fluoropyridine (0.90 g, 5.0 mmol, 89% yield) as a light yellow solid.

1. temperaturethen cooled to RT
2. customthe layers of the resulting biphasic mixture were separated
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customto give an oil that
7. customwas purified by silica gel chromatography