Beta-Alanine → 3-[(3-Benzyl-5-hydroxy-2-oxo-1-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]-propionic acid

HRID 919876Notes

Reaction equation

HRID 919876 reaction equation
CO[C:3]([C:5]1[C:6]([OH:29])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:10](=[O:21])[C:9]([CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=[CH:8]2)=[O:4].[NH2:30][CH2:31][CH2:32][C:33]([OH:35])=[O:34].C[O-].[Na+]>>[CH2:22]([C:9]1[C:10](=[O:21])[N:11]([C:15]2[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=2)[C:12]2[C:7]([CH:8]=1)=[C:6]([OH:29])[C:5]([C:3]([NH:30][CH2:31][CH2:32][C:33]([OH:35])=[O:34])=[O:4])=[N:14][CH:13]=2)[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1

Participants

4

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 682974473-Benzyl-5-hydroxy-2-oxo-1-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 682974093-[(3-Benzyl-5-hydroxy-2-oxo-1-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]-propionic acidYield 45.1%

Procedure

A mixture of 3-benzyl-5-hydroxy-2-oxo-1-phenyl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (25 mg, 0.065 mmol), β-alanine (767 mg, 8.6 mmol) and NaOMe solution (13 mL, 6.5 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 2. The organic layer was dried over MgSO4 and concentrated. The crude product was dissolved in saturated NaHCO3 and washed several times with ether. The aqueous layer was acidified to pH about 2, and the resulting precipitate was isolated by filtration to give 13 mg of the title compound. MS: (+) m/z 444.25 (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. dry with materialThe organic layer was dried over MgSO4
  6. concentrationconcentrated
  7. dissolutionThe crude product was dissolved in saturated NaHCO3
  8. washwashed several times with ether
  9. customthe resulting precipitate was isolated by filtration

Sources & evidence

ORD record
ord-1a02c3ad03704de5b5f4582b79caca1f
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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