Beta-Alanine → HCID 136377239, compound

HRID 919906Notes

Reaction equation

HRID 919906 reaction equation
CO[C:3]([C:5]1[C:6]([OH:29])=[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]=[N:27][CH:26]=[CH:25][N:24]=1)=[CH:8]2)=[O:4].[NH2:30][CH2:31][CH2:32][C:33]([OH:35])=[O:34].C[O-].[Na+]>>[CH2:15]([N:11]1[C:12]2[C:7](=[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)[CH:8]=[C:9]([C:23]2[CH:28]=[N:27][CH:26]=[CH:25][N:24]=2)[C:10]1=[O:22])[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

Participants

4

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 136377238HCID 136377238, compound

Product 1

HCID 136377239HCID 136377239, compoundYield 62.9%

Procedure

A mixture of 1-benzyl-5-hydroxy-2-oxo-3-pyrazin-2-yl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (40 mg, 0.10 mmol), β-alanine (735 mg, 8.25 mmol) and NaOMe solution (12.4 mL, 6.19 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 stilling until pH was about 2. The organic layer was dried over MgSO4 and concentrated. The crude solid was dissolved in saturated NaHCO3 and washed several times with ether. The aqueous layer was acidified to pH about 1 with 6 M HCl, and the resulting precipitate was isolated by filtration to give 28 mg of the title compound as a light yellow solid. MS: (+) m/z 446.27 (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 with vigorous stilling until pH was about 2
  5. dry with materialThe organic layer was dried over MgSO4
  6. concentrationconcentrated
  7. dissolutionThe crude solid was dissolved in saturated NaHCO3
  8. washwashed several times with ether
  9. customthe resulting precipitate was isolated by filtration

Sources & evidence

ORD record
ord-ca829fbcf5c445ed868057f1f0b9f995
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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