反应详情

3-fluoro-N-(3-fluorobenzyl)-6-methoxypyridin-2-amine (0.100 g, 0.400 mmol) was dissolved in anhydrous CH3CN (1.6 mL). This mixture was treated with sodium iodide (0.301 g, 2.01 mmol) followed by trimethylsilylchloride (0.257 mL, 0.218 g, 2.01 mmol). The resulting reaction mixture was then heated at reflux for 2 hr. The reaction mixture was then treated with MeOH (1 ml), and the resulting mixture was stirred at ambient temperature for 2 hr, and then concentrated in vacuo. The resulting residue was dissolved in EtOAc (25 ml) and partitioned with H2O (25 ml). The H2O layer was extracted with EtOAc (2×25 ml). The organic layers were combined and washed with brine (1×25 ml). The organic layer was dried (Na2SO4), filtered, and the solvent removed in vacuo. The resulting residue was subjected to silica gel column chromatography. Elution using 10 EtOAc/90 hexanes to 60 EtOAc/40 hexanes gave 0.060 g (64%) of 5-fluoro-6-(3-fluorobenzylamino)pyridine-2-ol. LCMS (m/z): 237.2 (MH+), retention time=0.74 min.

1. customThe resulting reaction mixture
2. temperaturewas then heated
3. temperatureat reflux for 2 hr
4. concentrationconcentrated in vacuo
5. dissolutionThe resulting residue was dissolved in EtOAc (25 ml)
6. custompartitioned with H2O (25 ml)
7. extractionThe H2O layer was extracted with EtOAc (2×25 ml)
8. washwashed with brine (1×25 ml)
9. dry with materialThe organic layer was dried (Na2SO4)
10. filtrationfiltered
11. customthe solvent removed in vacuo
12. washElution