Water → HCID 22388428, compound

HRID 1699798Notes

Reaction equation

HRID 1699798 reaction equation
[CH3:1][C:2]1[C:15]([C:16]([O:18]CC)=[O:17])=[C:5]2[CH:6]=[C:7]([C:10]([O:12]CC)=[O:11])[CH:8]=[CH:9][N:4]2[N:3]=1.[OH-].[Na+].O>C(O)C>[CH3:1][C:2]1[C:15]([C:16]([OH:18])=[O:17])=[C:5]2[CH:6]=[C:7]([C:10]([OH:12])=[O:11])[CH:8]=[CH:9][N:4]2[N:3]=1

Participants

5

Reactant 3

HCID 962WaterHCID 14798Sodium HydroxideHCID 22387816HCID 22387816, compound

Product 1

HCID 22388428HCID 22388428, compoundYield 62.7%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of diethyl 2-methylpyrazolo[1,5-a]pyridine-3,5-dicarboxylate (100 mg), a 50% aqueous sodium hydroxide solution (160 mg), water (0.5 ml) and ethanol (1.0 ml) was refluxed under heating for 30 min. Then, the reaction mixture was adjusted to pH 4 under ice-cooling and stirred at the same temperature for 30 min. The precipitate was collected by filtration and washed with water to give the objective compound (50 mg) as a pale-brown powder.

Workup

  1. temperatureunder heating for 30 min
  2. temperaturecooling
  3. filtrationThe precipitate was collected by filtration
  4. washwashed with water

Sources & evidence

ORD record
ord-80603e5ec64347459d01080dcadd77b9
Source dataset
uspto-grants-2002_02
Patent number
US06348474B1

Reaction notes

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