反应详情

A mixture of 1-benzyl-5-hydroxy-2-oxo-3-pyridin-3-yl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (35 mg, 0.090 mmol), β-alanine (806 mg, 9.0 mmol) and NaOMe solution (13.6 mL, 6.78 mmol, 0.5 M in MeOH) was refluxed for 16 h. After the mixture was cooled to r.t., the solvent was evaporated in vacuo. The residue was dissolved in water and washed several times with ether. The aqueous layer was acidified to pH about 3-4 with 1 M HCl, and the resulting precipitate was isolated by filtration to give 19 mg of the title compound. MS: (+) m/z 445.33 (M+1).

1. temperaturewas refluxed for 16 h
2. customthe solvent was evaporated in vacuo
3. dissolutionThe residue was dissolved in water
4. washwashed several times with ether
5. customthe resulting precipitate was isolated by filtration