反应详情

温度

80 °C

To a glass microwave vial was added 2-fluoro-3-iodopyrazine (1.6485 g, 7.36 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (2.319 g, 11.04 mmol), trans-dichlorobis(triphenylphosphine) palladium (II) (0.413 g, 0.589 mmol), and sodium carbonate (3.90 g, 36.8 mmol) in DME (19.63 mL) and water (4.91 mL) to stir at 80° C. overnight. The reaction mixture was diluted with water and extracted with dichloromethane. The organic extract was washed with water, sat NaCl, dried with magnesium sulfate, filtered, and concentrated. The crude product was adsorbed onto a plug of silica gel and chromatographed to provide 2-(3,6-dihydro-2H-pyran-4-yl)-3-fluoropyrazine. MS (ESI, pos. ion) m/z: 181.1.

1. extractionextracted with dichloromethane
2. extractionThe organic extract
3. washwas washed with water
4. dry with materialdried with magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customchromatographed