反应详情

To a solution of (3-fluoropyridin-4-yl)methanol (910 mg, 7.2 mmol) in anhydrous chloroform (25 mL) was added dropwise a solution of phosphorus tribromide (675 μL, 7.2 mmol) in anhydrous chloroform (10 mL) at 0° C. The mixture was stirred for 3 hours at room temperature. Water was added and extracted 3 times with dichloromethane. The organic phase was washed with brine and dried over magnesium sulfate. After evaporation of the solvent, 4-(bromomethyl)-3-fluoropyridine was obtained (260 mg, 19% yield) and used in the next step without further purification; 1H NMR (400 MHz, MeOd4): δ 0.81 (s, 2H), 8.25 (t, J=6.4 Hz, 1H). 8.76 (d, J=5.9 Hz, 1H), 9.05 (d, J=3.5 Hz, 1H).

1. extractionextracted 3 times with dichloromethane
2. washThe organic phase was washed with brine
3. dry with materialdried over magnesium sulfate
4. customAfter evaporation of the solvent