2-Aminoethanesulphonamide monohydrochloride → 1-Benzyl-5-cyano-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid (2-sulfamoyl-ethyl)-amide

HRID 1410828Notes

Reaction equation

HRID 1410828 reaction equation
C[O:2][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)=[C:7]([C:24]#[N:25])[N:6]=1)=O.Cl.[NH2:27][CH2:28][CH2:29][S:30]([NH2:33])(=[O:32])=[O:31].C[O-].[Na+]>CCO>[S:30]([CH2:29][CH2:28][NH:27][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)=[C:7]([C:24]#[N:25])[N:6]=1)=[O:2])(=[O:32])(=[O:31])[NH2:33]

Participants

5

Reactant 3

HCID 30215492-Aminoethanesulphonamide monohydrochlorideHCID 10942334Sodium MethoxideHCID 682972101-Benzyl-5-cyano-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester

Product 1

HCID 917583821-Benzyl-5-cyano-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid (2-sulfamoyl-ethyl)-amideYield 22.6%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 1-benzyl-5-cyano-8-hydroxy-2-oxo-1,2-dihydro-[1,6]naphthyridine-7-carboxylic acid methyl ester (20 mg, 0.060 mmol), 2-amino-ethanesulfonic acid amide HCl salt (30 mg, 0.24 mmol), and NaOMe (13 mg, 0.23 mmol) in EtOH (2 mL) was heated at 140° C. for 6 h in a microwave reactor. The mixture was concentrated to dryness, and the residue was partitioned between EtOAc and water. 1 M HCl was added with vigorous stiffing until pH about 1, and the aqueous layer was extracted with additional EtOAc. The organic layers were combined, dried over MgSO4, and concentrated. The crude product was first purified by column chromatography (0-5% MeOH/CH2Cl2), then by preparative TLC (10% MeOH/CH2Cl2) to give 5.8 mg of the title compound. MS: (−) m/z 426.24 (M−1).

Workup

  1. concentrationThe mixture was concentrated to dryness
  2. customthe residue was partitioned between EtOAc and water
  3. addition1 M HCl was added with vigorous stiffing until pH about 1
  4. extractionthe aqueous layer was extracted with additional EtOAc
  5. dry with materialdried over MgSO4
  6. concentrationconcentrated
  7. customThe crude product was first purified by column chromatography (0-5% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-dde7c22adf564a858ab6d161bebb0d7a
Source dataset
uspto-grants-2014_12
Patent number
US08921389B2

Reaction notes

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