Beta-Alanine → HCID 68297635, compound

HRID 919918Notes

Reaction equation

HRID 919918 reaction equation
CO[C:3]([C:5]1[C:6]([OH:34])=[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]=[CH:27][C:26]([O:29][C:30]([F:33])([F:32])[F:31])=[CH:25][CH:24]=1)=[CH:8]2)=[O:4].[NH2:35][CH2:36][CH2:37][C:38]([OH:40])=[O:39].C[O-].[Na+]>>[CH2:15]([N:11]1[C:12]2[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][CH:13]=2)[CH:8]=[C:9]([C:23]2[CH:28]=[CH:27][C:26]([O:29][C:30]([F:31])([F:32])[F:33])=[CH:25][CH: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 86714150HCID 86714150, compound

Product 1

HCID 68297635HCID 68297635, compoundYield 51.7%

Procedure

A mixture of 1-benzyl-5-hydroxy-2-oxo-3-(4-trifluoromethoxy-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (36 mg, 0.077 mmol), β-alanine (682 mg, 7.7 mmol) and NaOMe solution (12 mL, 6.1 mmol, 0.5 M in MeOH) was refluxed for 16 h. After cooling 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 washed with brine, 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 3 with 6 M HCl, and the resulting precipitate was isolated by filtration to give 21 mg of the title compound as a yellow solid. MS: (+) m/z 528.27 (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. washThe organic layer was washed with brine
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated
  8. dissolutionThe crude solid was dissolved in saturated NaHCO3
  9. washwashed several times with ether
  10. customthe resulting precipitate was isolated by filtration

Sources & evidence

ORD record
ord-fb153edf958941629963a8a739d96ac6
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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