Acetone → 2,6-dimethoxyanthraquinone

HRID 1488908Notes

Reaction equation

HRID 1488908 reaction equation
[OH:1][C:2]1[CH:15]=[CH:14][C:13]2[C:12](=[O:16])[C:11]3[C:6](=[CH:7][CH:8]=[C:9](O)[CH:10]=3)C(=O)[C:4]=2[CH:3]=1.[C:19](=[O:22])([O-])[O-].[K+].[K+].S([O:30][CH3:31])(OC)(=O)=O.O.[CH3:33]C(C)=O>>[CH3:33][O:1][C:2]1[CH:15]=[CH:14][C:13]2[C:12](=[O:16])[C:11]3[C:6](=[CH:7][CH:8]=[C:9]([O:30][CH3:31])[CH:10]=3)[C:19](=[O:22])[C:4]=2[CH:3]=1

Participants

6

Reactant 5

HCID 180AcetoneHCID 962WaterHCID 6497Dimethyl SulfateHCID 67762,6-DihydroxyanthraquinoneHCID 11430Potassium Carbonate

Product 1

HCID 45899982,6-dimethoxyanthraquinone

Procedure

To a suspension of 2,6-dihydroxyanthraquinone (3 g, 12.5 mmole) and anhydrous potassium carbonate (23 g) in acetone (400 ml), dimethyl sulfate (20 g, 158 mmole) was added at room temperature, and the mixture was reacted with stirring for 6 hours under reflux. After standing at room temperature overnight, the reaction mixture was poured into cold H2O (850 ml), and the precipitate was filtered and dried. The resultant crude dark brown solid (3.1 g) was recrystallized from benzene to give 2.7 g of 2,6-dimethoxyanthraquinone as yellow-brown crystals.

Workup

  1. additionwas added at room temperature
  2. customthe mixture was reacted
  3. temperatureunder reflux
  4. waitAfter standing at room temperature overnight
  5. filtrationthe precipitate was filtered
  6. customdried
  7. customThe resultant crude dark brown solid (3.1 g) was recrystallized from benzene

Sources & evidence

ORD record
ord-b3de55b78ca9480885aa6197f46df532
Source dataset
uspto-grants-1997_10
Patent number
US05677112

Reaction notes

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