Potassium Carbonate → HCID 67532034, compound

HRID 240369Notes

Reaction equation

HRID 240369 reaction equation
[CH3:1][C:2]1[N:7]=[C:6]([N:8]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[N:11]=[C:10]([C:18]([O:20]CC)=[O:19])[C:9]2=[O:23])[CH:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+]>O1CCOCC1.O>[CH3:1][C:2]1[N:7]=[C:6]([N:8]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[N:11]=[C:10]([C:18]([OH:20])=[O:19])[C:9]2=[O:23])[CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 2

HCID 11430Potassium CarbonateHCID 68473442HCID 68473442, compound

Product 1

HCID 67532034HCID 67532034, compoundYield 94.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
60 °C

Procedure

27.2 g (88 mmol) of ethyl 1-(6-methylpyridine-2-yl)-2-oxo-1,2-dihydroquinoxaline-3-carboxylate was dissolved in 1,4-dioxane (50 ml) and water (50 ml), and 18.3 g (0.13 mol) of potassium carbonate was added thereto, and the solution was stirred for 1 hour at 60° C. The solvent was distilled off under reduced pressure and the aqueous layer was adjusted to pH<4. The precipitated crystals were filtered to obtain 23.3 g (yield: 94%) of 1-(6-methylpyridine-2-yl)-2-oxo-1,2-dihydroquinoxaline-3-carboxylic acid.

Workup

  1. distillationThe solvent was distilled off under reduced pressure
  2. filtrationThe precipitated crystals were filtered

Sources & evidence

ORD record
ord-cbd236399c2441cf9581d9d457a6eec2
Source dataset
uspto-grants-2014_02
Patent number
US08648075B2

Reaction notes

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