Glycine → [(1,3-Dibenzyl-5-hydroxy-8-methyl-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]-acetic acid

HRID 919700Notes

Reaction equation

HRID 919700 reaction equation
CO[C:3]([C:5]1[C:6]([OH:31])=[C:7]2[C:12](=[C:13]([CH3:15])[N:14]=1)[N:11]([CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[C:10](=[O:23])[C:9]([CH2:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)=[CH:8]2)=[O:4].[NH2:32][CH2:33][C:34]([OH:36])=[O:35].C[O-].[Na+]>>[CH2:16]([N:11]1[C:12]2[C:7](=[C:6]([OH:31])[C:5]([C:3]([NH:32][CH2:33][C:34]([OH:36])=[O:35])=[O:4])=[N:14][C:13]=2[CH3:15])[CH:8]=[C:9]([CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C:10]1=[O:23])[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Participants

4

Reactant 3

HCID 750GlycineHCID 10942334Sodium MethoxideHCID 682972741,3-Dibenzyl-5-hydroxy-8-methyl-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 60152912[(1,3-Dibenzyl-5-hydroxy-8-methyl-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carbonyl)-amino]-acetic acidYield 38.3%

Procedure

A mixture of 1,3-dibenzyl-5-hydroxy-8-methyl-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (40 mg, 0.097 mmol), glycine (2.90 g, 38.6 mmol) and NaOMe solution (58 mL, 29 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 dissolved in saturated NaHCO3 and washed with ether. The aqueous layer was acidified to pH about 2, and the resulting mixture was extracted with EtOAc. The organic layer was dried over MgSO4 and concentrated. The residue was further purified by silica gel chromatography (0-60% EtOAc/hexanes+2% AcOH) to give 17 mg of the title compound MS: (+) m/z 458.17 (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 residue was further purified by silica gel chromatography (0-60% EtOAc/hexanes+2% AcOH)

Sources & evidence

ORD record
ord-5788c35e9a3b47caaec3fb8e64762675
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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