反应详情

A mixture of 7-benzyl-1-cyano-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester (25 mg, 0.075 mmol), glycine (745 mg, 9.9 mmol) and NaOMe solution (15 mL, 7.5 mmol, 0.5 M in MeOH) was refluxed for 16 h. After the mixture was cooled to r.t., solvent was evaporated in vacuo. The residue was partitioned between EtOAc (50 mL) and water (30 mL). 1 M HCl was added with vigorous stirring until pH was about 2. The aqueous layer was extracted with additional EtOAc, and the combined organic layer was dried over MgSO4 and concentrated. The crude product was chromatographed (20-100% EtOAc/hexanes+2% AcOH) to give 19 mg of the title compound as an off-white solid. MS: (+) m/z 378.95 (M+1).

1. temperaturewas refluxed for 16 h
2. customsolvent was evaporated in vacuo
3. customThe residue was partitioned between EtOAc (50 mL) and water (30 mL)
4. addition1 M HCl was added
5. extractionThe aqueous layer was extracted with additional EtOAc
6. dry with materialthe combined organic layer was dried over MgSO4
7. concentrationconcentrated
8. customThe crude product was chromatographed (20-100% EtOAc/hexanes+2% AcOH)