Acetic Acid → 1-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid (2-acetylamino-ethyl)-amide

HRID 919813Notes

Reaction equation

HRID 919813 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][NH:27][C:28](=[O:30])[CH3:29].CC(O)=O.O>CCO.CCOC(C)=O>[C:28]([NH:27][CH2:26][CH2:25][NH:24][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:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)=[CH:7][N:6]=1)=[O:4])(=[O:30])[CH3:29]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 962WaterHCID 66082N-(2-aminoethyl)acetamideHCID 682971941-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester

Product 1

HCID 867141231-Benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid (2-acetylamino-ethyl)-amideYield 64.7%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 1-benzyl-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester (20 mg, 0.065 mmol) and N-(2-amino-ethyl)-acetamide (20 mg, 0.19 mmol) in EtOH (3 mL) was refluxed for 16 h. After cooling to r.t., AcOH (0.1 mL), water (15 mL) and EtOAc (20 mL) were added. The aqueous layer was extracted with additional EtOAc, and the organic layers were combined, dried over MgSO4, and concentrated. The crude product was purified by silica gel chromatography (0-7% MeOH/CH2Cl2) to give 16 mg of the title compound as a light yellow solid. MS: (+) m/z 381.34 (M+1).

Workup

  1. temperaturewas refluxed for 16 h
  2. extractionThe aqueous layer was extracted with additional EtOAc
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated
  5. customThe crude product was purified by silica gel chromatography (0-7% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-be95c265377143d69166db4bb3c43978
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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