Glycine → [(1,3-Dibenzyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]acetic acid

HRID 1410665Notes

Reaction equation

HRID 1410665 reaction equation
CO[C:3]([C:5]1[C:6]([OH:30])=[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]([CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[CH:8]2)=[O:4].[NH2:31][CH2:32][C:33]([OH:35])=[O:34].C[O-].[Na+]>>[CH2:15]([N:11]1[C:12]2[C:7](=[C:6]([OH:30])[C:5]([C:3]([NH:31][CH2:32][C:33]([OH:35])=[O:34])=[O:4])=[N:14][CH:13]=2)[CH:8]=[C:9]([CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=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 750GlycineHCID 10942334Sodium MethoxideHCID 682973641,3-Dibenzyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 60152764[(1,3-Dibenzyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]acetic acidYield 38%

Procedure

A mixture of 1,3-dibenzyl-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (75 mg, 0.19 mmol), glycine (1.87 g, 24.9 mmol) and NaOMe solution (37.5 mL, 18.8 mmol, 0.5M in MeOH) was refluxed for 16 h. After the mixture was cooled to r.t., the solvent was evaporated in vacuo. The residue was dissolved in saturated NaHCO3 and washed with ether. The aqueous layer was acidified to pH 2 with 4M HCl, and the resulting mixture was extracted with EtOAc. The organic layer was dried over MgSO4 and concentrated. The crude product was further purified by silica gel chromatography (20-100% EtOAc/hexanes+2% AcOH) to give 32 mg of the title compound as an off-white solid. MS: (+) m/z 444.11 (M+1).

Workup

  1. temperaturewas refluxed for 16 h
  2. customthe solvent was evaporated in vacuo
  3. dissolutionThe residue was dissolved in saturated NaHCO3
  4. washwashed with ether
  5. extractionthe resulting mixture was extracted with EtOAc
  6. dry with materialThe organic layer was dried over MgSO4
  7. concentrationconcentrated
  8. customThe crude product was further purified by silica gel chromatography (20-100% EtOAc/hexanes+2% AcOH)

Sources & evidence

ORD record
ord-22d682cb7b854bc0b0635f3bea02f635
Source dataset
uspto-grants-2014_12
Patent number
US08921389B2

Reaction notes

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