反应详情

To a solution of methyl 8-hydroxy-1,6-naphthyridine-7-carboxylate from Example 1, Step 2 (0.05 g, 0.245 mmol) in dry toluene (3 mL) was added 1-pyridin-2-ylmethanamine (0.029 g, 0.270 mmol) and the mixture was heated to reflux for 16 hours. The solution was reduced to a smaller volume and refluxed for 4 additional hours. The solvent was removed under reduced pressure and the residue redissolved in DMF and filtered and the solution was purified by preparative HPLC (Gilson semipreparative HPLC system and a YMC Combiprep Column (50×20 mm I.D., C18, S-5 uM, 120 A) eluting with 5-95% acetonitrile/water (0.1% TFA) at 15 ml/min) to afford the title compound after lyophilization.

1. temperaturethe mixture was heated
2. temperatureto reflux for 16 hours
3. temperaturerefluxed for 4 additional hours
4. customThe solvent was removed under reduced pressure
5. dissolutionthe residue redissolved in DMF
6. filtrationfiltered
7. customthe solution was purified by preparative HPLC (Gilson semipreparative HPLC system
8. washa YMC Combiprep Column (50×20 mm I.D., C18, S-5 uM, 120 A) eluting with 5-95% acetonitrile/water (0.1% TFA) at 15 ml/min)