Beta-Alanine → HCID 60152116, compound

HRID 920017Notes

Reaction equation

HRID 920017 reaction equation
CO[C:3]([C:5]1[C:6]([OH:31])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10](=[O:22])[C:9]([C:23]1[CH:28]=[CH:27][CH:26]=[C:25]([O:29][CH3:30])[CH:24]=1)=[CH:8]2)=[O:4].[NH2:32][CH2:33][CH2:34][C:35]([OH:37])=[O:36].C[O-].[Na+]>>[CH2:15]([N:11]1[C:12]2[C:7](=[C:6]([OH:31])[C:5]([C:3]([NH:32][CH2:33][CH2:34][C:35]([OH:37])=[O:36])=[O:4])=[N:14][CH:13]=2)[CH:8]=[C:9]([C:23]2[CH:28]=[CH:27][CH:26]=[C:25]([O:29][CH3:30])[CH:24]=2)[C:10]1=[O:22])[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

Participants

4

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 68297520HCID 68297520, compound

Product 1

HCID 60152116HCID 60152116, compoundYield 75.4%

Procedure

A mixture of 1-benzyl-5-hydroxy-3-(3-methoxy-phenyl)-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (35 mg, 0.084 mmol), β-alanine (600 mg, 6.7 mmol) and NaOMe solution (10 mL, 5.0 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 partitioned between EtOAc and water. 1 M HCl was added with vigorous stirring until pH was about 3. The aqueous layer was extracted with additional EtOAc, and the organic layers were combined, dried over MgSO4 and concentrated. The residue was dissolved in saturated NaHCO3 and washed several times with ether. The aqueous layer was acidified to pH about 3, and the resulting precipitate was isolated by filtration to give 30 mg of the title compound as a yellow solid. MS: (+) m/z 474.36 (M+1).

Workup

  1. temperaturewas refluxed for 16 h
  2. customthe solvent was evaporated in vacuo
  3. customThe residue was partitioned between EtOAc and water
  4. addition1 M HCl was added
  5. extractionThe aqueous layer was extracted with additional EtOAc
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated
  8. dissolutionThe residue was dissolved in saturated NaHCO3
  9. washwashed several times with ether
  10. customthe resulting precipitate was isolated by filtration

Sources & evidence

ORD record
ord-524f8a5840a246539d05f1250413ced5
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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