HCID 23471436, compound → HCID 23471407, compound

HRID 128076Notes

Reaction equation

HRID 128076 reaction equation
[CH3:1][O:2][C:3]1[C:16]2[C:7](=[C:8]3[CH:18]([OH:19])[CH:17]([OH:20])[C:15]=2[C:14]2[C:9]3=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:6]([O:21][CH3:22])=[CH:5][CH:4]=1.C([O-])(=O)C.C([O-])(=O)C.C([O-])(=O)C.C([O-])(=O)C.[Pb+4]>C(O)(=O)C>[CH3:22][O:21][C:6]1[C:7]2[C:16](=[C:15]([CH:17]=[O:20])[C:14]3[C:9]([C:8]=2[CH:18]=[O:19])=[CH:10][CH:11]=[CH:12][CH:13]=3)[C:3]([O:2][CH3:1])=[CH:4][CH:5]=1

Participants

4

Reactant 2

HCID 23471436HCID 23471436, compoundHCID 178418268HCID 178418268, compound

Product 1

HCID 23471407HCID 23471407, compound

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

A mixture of isomers of 1,4-dimethoxy-11,12-dihydroxy-9,10-ethano-anthracene weighing 10 g. is dissolved in 150 ml. of glacial acetic acid at 50° C. and treated portionwise with 30 g. of lead tetraacetate. After 2 hours at 50° C., the solution is filtered to remove insoluble materials and cooled yielding orange crystals, which are filtered, washed with glacial acetic acid and dried, m.p. 208°-212° C.

Workup

  1. dissolutionis dissolved in 150 ml
  2. filtrationthe solution is filtered
  3. customto remove insoluble materials
  4. temperaturecooled
  5. customyielding orange crystals, which
  6. filtrationare filtered
  7. washwashed with glacial acetic acid
  8. customdried

Sources & evidence

ORD record
ord-eba45b1c03934e9d9e0cf449e29a48ff
Source dataset
uspto-grants-1981_03
Patent number
US04258181

Reaction notes

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