Rhone-poulenc Chimie

Daniel Manaut

Michel Costantini

Daniel Michelet

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.

Preparation of p-fuchsones and synthesis of p-dihydroxylated aromatic

Preparation of P-fuchsones and synthesis of P-Dihydroxylated aromatic

o-Dihydroxylated aromatic compounds, for example pyrocatechol, are selectively prepared by reacting an o-fuchsone with an oxidizing agent, for example hydrogen peroxide, optionally in the presence of a catalytically effective amount of an acid catalyst.

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Meyzieu, France

Daniel Manaut