Oxalic Acid → HCID 86737605, compound

HRID 127833Notes

Reaction equation

HRID 127833 reaction equation
[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].C(O)(=O)C(O)=O.[CH:15]1[C:20]([OH:21])=[CH:19][CH:18]=[C:17]([CH3:22])[CH:16]=1>>[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].[CH:19]1[C:20]([OH:21])=[CH:15][CH:16]=[C:17]([CH3:22])[CH:18]=1

Participants

4

Reactant 3

HCID 971Oxalic AcidHCID 2879P-Cresol2×HCID 5054Resorcinol2×

Product 1

HCID 86737605HCID 86737605, compound

Procedure

Subsequently, the reflux condenser on the flask is substituted with a separator, and then the temperature of the mixture is adjusted to 60° C. and thereto are added resorcinol (220 g, 2.0 mol) and oxalic acid (11 g). After dissolving completely, the temperature of the mixture is raised, and thereby, the pre-polycondensate of p-cresol is reacted with resorcinol for 4 hours, during which the produced water-toluene azeotrope is led to the separator. The toluene separated is circulated to the flask and water separated is removed out of the reaction system. After completion of the reaction, toluene is distilled off, and finally, the mixture is concentrated at 150° C. under reduced pressure (reduced degree: 30 mmHg or less) to give a resorcinol/p-cresol/co-polycondensate resin (Resin O) having a softening point of 104° C.

Workup

  1. customis adjusted to 60° C.
  2. dissolutionAfter dissolving completely
  3. temperaturethe temperature of the mixture is raised
  4. customThe toluene separated
  5. customseparated
  6. customis removed out of the reaction system
  7. customAfter completion of the reaction, toluene
  8. distillationis distilled off
  9. concentrationfinally, the mixture is concentrated at 150° C. under reduced pressure (reduced degree: 30 mmHg or less)

Sources & evidence

ORD record
ord-f6b17b646516430baf94412725587677
Source dataset
uspto-grants-1981_03
Patent number
US04257926

Reaction notes

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