Hydroxylamine HCl → 1-Ethoxycarbonylmethyl-7-(3-hydroxyiminomethyl-1-pyrrolyl)-6-trifluoromethyl-2,3(1H,4H)-quinoxalinedione

HRID 861536Notes

Reaction equation

HRID 861536 reaction equation
[CH2:1]([O:3][C:4]([CH2:6][N:7]1[C:16]2[C:11](=[CH:12][C:13]([C:24]([F:27])([F:26])[F:25])=[C:14]([N:17]3[CH:21]=[CH:20][C:19]([CH:22]=O)=[CH:18]3)[CH:15]=2)[NH:10][C:9](=[O:28])[C:8]1=[O:29])=[O:5])[CH3:2].[Cl-].[OH:31][NH3+:32].C([O-])(=O)C.[Na+]>O.CCO>[CH2:1]([O:3][C:4]([CH2:6][N:7]1[C:16]2[C:11](=[CH:12][C:13]([C:24]([F:27])([F:26])[F:25])=[C:14]([N:17]3[CH:21]=[CH:20][C:19]([CH:22]=[N:32][OH:31])=[CH:18]3)[CH:15]=2)[NH:10][C:9](=[O:28])[C:8]1=[O:29])=[O:5])[CH3:2]

Participants

5

Reactant 3

HCID 21645Hydroxylamine HClHCID 517045Sodium AcetateHCID 153379971-(Ethoxycarbonylmethyl)-7-(3-formyl-1-pyrrolyl)-6-trifluoromethyl-2,3(1H,4H)-quinoxalinedione

Product 1

HCID 542796031-Ethoxycarbonylmethyl-7-(3-hydroxyiminomethyl-1-pyrrolyl)-6-trifluoromethyl-2,3(1H,4H)-quinoxalinedioneYield 130%

Reagents, catalysts & solvents 1

HCID 19096565Water ethanolSolvent

Procedure

1.2 g (2.9 mmol) of the compound from Example 70, 0.4 g (6 mmol) of hydroxylammonium chloride and 0.48 g (6 mmol) of sodium acetate in 45 ml of H2O/EtOH (2:1) were refluxed for 30 minutes. The organic solvent was removed under reduced pressure, and the resulting aqueous phase was extracted with ethyl acetate. The organic phase was dried and concentrated under reduced pressure. The residue was recrystallized from ethanol to yield 1.6 g (70%) of the product. Melting point>250° C.

Workup

  1. customThe organic solvent was removed under reduced pressure
  2. extractionthe resulting aqueous phase was extracted with ethyl acetate
  3. customThe organic phase was dried
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was recrystallized from ethanol

Sources & evidence

ORD record
ord-c9d1eb70d9964197984294fb12357841
Source dataset
uspto-grants-1998_02
Patent number
US05714489

Reaction notes

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