Beta-Alanine → HCID 68297489, compound

HRID 919989Notes

Reaction equation

HRID 919989 reaction equation
CO[C:3]([C:5]1[C:6]([OH:36])=[C:7]2[C:12](=[C:13]([C:15]3[CH:16]=[N:17][CH:18]=[CH:19][CH:20]=3)[N:14]=1)[N:11]([C@H:21]([C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)[CH3:22])[C:10](=[O:29])[C:9]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)=[CH:8]2)=[O:4].[NH2:37][CH2:38][CH2:39][C:40]([OH:42])=[O:41].C[O-].[Na+]>C([O-])(O)=O.[Na+]>[OH:36][C:6]1[C:5]([C:3]([NH:37][CH2:38][CH2:39][C:40]([OH:42])=[O:41])=[O:4])=[N:14][C:13]([C:15]2[CH:16]=[N:17][CH:18]=[CH:19][CH:20]=2)=[C:12]2[C:7]=1[CH:8]=[C:9]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)[C:10](=[O:29])[N:11]2[C@H:21]([C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1)[CH3:22]

Participants

5

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 68297493HCID 68297493, compound

Product 1

HCID 68297489HCID 68297489, compoundYield 47.5%

Reagents, catalysts & solvents 1

HCID 516892Sodium BicarbonateSolvent

Procedure

A mixture of (S)-5-hydroxy-2-oxo-3-phenyl-1-(1-phenyl-ethyl)-8-pyridin-3-yl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (30 mg, 0.063 mmol), β-alanine (672 mg, 7.5 mmol) and NaOMe solution (11 mL, 5.7 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 3-4. The aqueous layer was extracted with additional EtOAc, and the organic layers were combined, dried over MgSO4 and concentrated. The residue was purified by silica gel chromatography (10-100% EtOAc/hexanes+1% AcOH). The product isolated was dissolved in saturated NaHCO3 and washed several times with ether. The aqueous layer was acidified to pH about 3-4 with 6 M HCl, and the resulting precipitate was isolated by filtration to give 16 mg of the title compound. MS: (+) m/z 535.39 (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. customThe residue was purified by silica gel chromatography (10-100% EtOAc/hexanes+1% AcOH)
  9. customThe product isolated
  10. washwashed several times with ether
  11. customthe resulting precipitate was isolated by filtration

Sources & evidence

ORD record
ord-30d05bcd8b0b4d57879d330a5ec05aac
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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