反应详情

To a solution 1,6-naphthyridine (2.09 g, 16.05 mmol) in acetonitrile (50.0 ml) is added benzylbromide (3.30 g, 19.27 mmol, 1.2 eq.) and NaI (50.0 mg). The resulting mixture is refluxed under nitrogen overnight. Acetonitrile is evaporated, and the residue is washed with ether (20 ml), and dried in vacuo to give the quaternary salt, which is dissolved in a mixture of MeOH (90 ml) and water (30 ml). To the solution at 0° C. is added sodium borohydride (2.28 g, 96.5 mmol, about 6.0 eq.). The resulting mixture is warmed to rt, and stirred overnight. The organic solvent is evaporated, and the residue is taken up in water (50 ml), extracted with EtOAc (50 ml×3). The combined organic phase is washed with brine, dried over sodium sulfate, and concentrated. The crude product is purified by silica gel chromatography (Hexane/EtOAc 1:1 plus 4% TEA) to give the title compound. MS (+VE) m/z 225.1 (M++1).

1. temperatureThe resulting mixture is refluxed under nitrogen overnight
2. customAcetonitrile is evaporated
3. washthe residue is washed with ether (20 ml)
4. customdried in vacuo
5. customto give the quaternary salt, which
6. customThe organic solvent is evaporated
7. extractionextracted with EtOAc (50 ml×3)
8. washThe combined organic phase is washed with brine
9. dry with materialdried over sodium sulfate
10. concentrationconcentrated
11. customThe crude product is purified by silica gel chromatography (Hexane/EtOAc 1:1 plus 4% TEA)