Sodium Hydroxide → HCID 18441970, compound

HRID 1879408Notes

Reaction equation

HRID 1879408 reaction equation
N1C(C([O-])=O)=C[N:4]=[C:3]([C:10]([O:12][CH2:13][CH3:14])=[O:11])[CH:2]=1.[OH-:15].[Na+]>C(O)C>[CH2:13]([O:12][C:10]([C:3]1[N:4]=[N:4][C:3]([C:10]([OH:11])=[O:15])=[CH:2][CH:2]=1)=[O:11])[CH3:14]

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 86656579HCID 86656579, compound

Product 1

HCID 18441970HCID 18441970, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

1.15 g of ethyl pyrazine-3,6-dicarboxylate was dissolved in 34.5 mL of ethanol, and 5.64 mL of a 1 M aqueous sodium hydroxide solution was added thereto, followed by stirring at room temperature for 3.5 hours. The precipitated salt was collected by filtration and dissolved in a small amount of water, and then this solution was acidified (pH=2) with a 1 M aqueous hydrochloric acid solution, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate, and then the solvent was evaporated to obtain 435 mg of 6-(ethoxycarbonyl)pyridazine-3-carboxylic acid.

Workup

  1. filtrationThe precipitated salt was collected by filtration
  2. dissolutiondissolved in a small amount of water
  3. extractionfollowed by extraction with ethyl acetate
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. customthe solvent was evaporated

Sources & evidence

ORD record
ord-28f0a939f0bb4d59a4260a7dd536615f
Source dataset
uspto-grants-2012_11
Patent number
US08314240B2

Reaction notes

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