Preparation of p-fuchsones and synthesis of p-dihydroxylated aromatic compounds therefrom
US5466839A · kind A · utility
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30Claims
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Key dates
| Filing date | Jan 10, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Jan 10, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C49/753
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
p-Dihydroxylated aromatic compounds are prepared via the oxidation of p-fuchsones, the latter advantageously being synthesized by reacting a phenolic compound having at least one hydrogen atom in the para-position to the hydroxyl function with a non-enolizable ketonic compound, in the presence of a catalytically effective amount of an acid catalyst and, optionally, a cocatalytically effective amount of an ionizable sulfur-containing compound.
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