Beta-Alanine → 3-[(1-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carbonyl)-amino]-propionic acid

HRID 919785Notes

Reaction equation

HRID 919785 reaction equation
CO[C:3]([C:5]1[C:14]([OH:15])=[C:13]2[C:8]([CH:9]=[CH:10][C:11](=[O:23])[N:12]2[CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:7][N:6]=1)=[O:4].[NH2:24][CH2:25][CH2:26][C:27]([OH:29])=[O:28].C[O-].[Na+]>>[CH2:16]([N:12]1[C:13]2[C:8](=[CH:7][N:6]=[C:5]([C:3]([NH:24][CH2:25][CH2:26][C:27]([OH:29])=[O:28])=[O:4])[C:14]=2[OH:15])[CH:9]=[CH:10][C:11]1=[O:23])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

4

Reactant 3

HCID 239Beta-AlanineHCID 10942334Sodium MethoxideHCID 682971941-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester

Product 1

HCID 601511293-[(1-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carbonyl)-amino]-propionic acidYield 53.6%

Procedure

A mixture of 1-benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester (19 mg, 0.061 mmol), β-alanine (726 mg, 8.15 mmol) and NaOMe solution (12.3 mL, 6.113 mmol, 0.5 M in MeOH) was refluxed for 16 h. Solvent was evaporated in vacuo, and the residue was dissolved in saturated NaHCO3 and washed several times with ether. The aqueous layer was acidified to pH about 1 with 4 M HCl, and the resulting precipitate was collected by filtration and dried to give 12 mg of the title compound as a pale pink solid. MS: (+) m/z 368.33 (M+1).

Workup

  1. temperaturewas refluxed for 16 h
  2. customSolvent was evaporated in vacuo
  3. dissolutionthe residue was dissolved in saturated NaHCO3
  4. washwashed several times with ether
  5. filtrationthe resulting precipitate was collected by filtration
  6. customdried

Sources & evidence

ORD record
ord-3c8f20c7f9d8487ba14a64a17c384331
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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