Beta-Alanine → HCID 68297388, compound

HRID 1411083Notes

Reaction equation

HRID 1411083 reaction equation
CO[C:3]([C:5]1[C:6]([OH:34])=[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]([CH2:21][CH:22]1[CH2:26][CH2:25][CH2:24][CH2:23]1)[C:10](=[O:27])[C:9]([C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[CH:8]2)=[O:4].[NH2:35][CH2:36][CH2:37][C:38]([OH:40])=[O:39].C[O-].[Na+]>C([O-])(O)=O.[Na+]>[CH:22]1([CH2:21][N:11]2[C:12]3[C:7](=[C:6]([OH:34])[C:5]([C:3]([NH:35][CH2:36][CH2:37][C:38]([OH:40])=[O:39])=[O:4])=[N:14][C:13]=3[C:15]3[CH:16]=[N:17][CH:18]=[CH:19][CH:20]=3)[CH:8]=[C:9]([C:28]3[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=3)[C:10]2=[O:27])[CH2:26][CH2:25][CH2:24][CH2:23]1

Participants

5

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 68297368HCID 68297368, compound

Product 1

HCID 68297388HCID 68297388, compoundYield 34.8%

Reagents, catalysts & solvents 1

HCID 516892Sodium BicarbonateSolvent

Procedure

A mixture of 1-cyclopentylmethyl-5-hydroxy-2-oxo-3-phenyl-8-pyridin-3-yl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (38 mg, 0.084 mmol), β-alanine (595 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 3-4. 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 (5-90% 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, and the resulting precipitate was isolated by filtration to give 15 mg of the title compound as a pale yellow solid. MS: (+) m/z 513.47 (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 (5-90% 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-d58fd7b521a748e29b2db0e94a7015fb
Source dataset
uspto-grants-2014_12
Patent number
US08921389B2

Reaction notes

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