反应详情

Sodium hydride (60% dispersion in oil, 1.83 g, 46.0 mmol) was suspended in anhydrous DMF (50 mL) at under N2 at room temperature with stirring. A solution of 2-chloro-5-hydroxy-pyridine (5.0 g, 38.2 mmol) in anhydrous DMF (20 mL) was added dropwise over 30 min. Stirring at room temperature was continued for 1.5 hours. Chloromethyl methylether (3.32 mL, 44.1 mmol) was next added neat over 20 min. Stirring was continued at room temperature for 12 hours. The mixture was partitioned between water and EtOAc. The organics were washed with brine, dried over Na2SO4, filtered and concentrated. The crude residue was chromatographed on silica gel, eluting with 20% EtOAc in Hexanes to provide the desired product as a clear oil (6.4 g, 96%). 1H NMR (400 MHz, CDCl3): δ 8.18 (s, 1H), 7.36 (d, J=8.6 Hz, 1H), 7.23 (d, J=8.6 Hz, 1H), 5.19 (s, 2H), 3.50 (s, 3H).

1. stirringStirring at room temperature
2. stirringStirring
3. waitwas continued at room temperature for 12 hours
4. customThe mixture was partitioned between water and EtOAc
5. washThe organics were washed with brine
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe crude residue was chromatographed on silica gel
10. washeluting with 20% EtOAc in Hexanes