Beta-Alanine → HCID 68297553, compound

HRID 1410947Notes

Reaction equation

HRID 1410947 reaction equation
CO[C:3]([C:5]1[C:6]([OH:28])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][C:16]1[S:17][CH:18]=[CH:19][N:20]=1)[C:10](=[O:21])[C:9]([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[CH:8]2)=[O:4].[NH2:29][CH2:30][CH2:31][C:32]([OH:34])=[O:33].C[O-].[Na+]>>[OH:28][C:6]1[C:5]([C:3]([NH:29][CH2:30][CH2:31][C:32]([OH:34])=[O:33])=[O:4])=[N:14][CH:13]=[C:12]2[C:7]=1[CH:8]=[C:9]([C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1)[C:10](=[O:21])[N:11]2[CH2:15][C:16]1[S:17][CH:18]=[CH:19][N:20]=1

Participants

4

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 68297674HCID 68297674, compound

Product 1

HCID 68297553HCID 68297553, compoundYield 36.8%

Procedure

A mixture of 5-hydroxy-2-oxo-3-phenyl-1-thiazol-2-ylmethyl-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (16 mg, 0.041 mmol), β-alanine (472 mg, 5.3 mmol) and NaOMe solution (8 mL, 4.1 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 4. 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 with 6 M HCl, and the resulting precipitate was isolated by filtration to give 6.8 mg of the title compound as a light brown solid. MS: (+) m/z 451.18 (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-8ecfdbcc1a3045449547f556f2107a61
Source dataset
uspto-grants-2014_12
Patent number
US08921389B2

Reaction notes

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