Hydroquinone → HCID 178524617, compound

HRID 1641475Notes

Reaction equation

HRID 1641475 reaction equation
[C:1]1([CH:8]=[CH:7][C:5]([OH:6])=[CH:4][CH:3]=1)[OH:2].[C:9](=[O:12])([O-:11])[O-].[K+:13].[K+].[CH:15]([O-:17])=[O:16].[K+]>>[OH:2][C:1]1[CH:8]=[C:7]([C:15]([O-:17])=[O:16])[C:5]([OH:6])=[CH:4][C:3]=1[C:9]([O-:11])=[O:12].[K+:13].[K+:13]

Participants

4

Reactant 3

HCID 785Hydroquinone2×HCID 11430Potassium CarbonateHCID 2735122Potassium Formate

Product 1

HCID 178524617HCID 178524617, compound

Conditions

Temperature
200 °C

Procedure

Dipotassium 2,5-dihydroxyterephthalate was prepared in the known “Kolbe-Schmidt” type reaction from hydroquinone. Hydroquinone was mixed with potassium carbonate and potassium formate, the latter which acted as a solvent when molten. The mixture was heated to 200° C. with stirring to provide a homogeneous solution. Excess carbon dioxide was bubbled through the stirred solution for about 8 h. Excess carbon dioxide optionally may be recycled. The reaction mass was drowned in water, and filtered. When the drowned and stirred reaction mass was filtered, the sparingly soluble dipotassium 2,5-dihydroxyterephthalate was separated from water-soluble potassium formate and potassium carbonate.

Workup

  1. customto provide a homogeneous solution
  2. customExcess carbon dioxide was bubbled through the stirred solution for about 8 h
  3. filtrationfiltered
  4. stirringstirred
  5. customreaction mass
  6. filtrationwas filtered
  7. customthe sparingly soluble dipotassium 2,5-dihydroxyterephthalate was separated from water-soluble potassium formate and potassium carbonate

Sources & evidence

ORD record
ord-417c612c452247228745164ad85a4be2
Source dataset
uspto-grants-2012_02
Patent number
US08115007B2

Reaction notes

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