Process for the preparation of quinones
AssigneesConsiglio Nazionale Della Ricerche, Enicham Synthesis, Brichima S.p.A.
InventorsFrancesco Minisci, Attilio Citterio, Elena Vismara, Silvia De Bernardinis, Carlo Neri, Luciano Pallini, Mariano Correale
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Abstract
Phenols are oxidated to quinones with hydrogen peroxide in the presence of catalytic amounts of bromine, iodine, hydrogen bromide and hydrogen iodide.
Claims22
A process for the synthesis of quinones consisting essentially of oxidizing a 2,6-di-substituted mono-phenol or a 2,6-di-substituted diphenol with H.sub.2 O.sub.2 or H.sub.2 O.sub.2 in an aqueous solution, in the presence of a catalytic amount of catalyst selected from the group consisting of bromine, iodine, hydrogen bromide and hydrogen iodide.
A process for the synthesis of quinones consisting essentially of oxidizing a 2,6-di-substituted mono-phenol or a 2,6-di-substituted diphenol with H.sub.2 O.sub.2 or H.sub.2 O.sub.2 in an aqueous solution, in the presence of a catalytic amount of a catalyst selected from the group consisting of bromine, iodine, hydrogen bromide and hydrogen iodide, wherein the oxidation is carried out in the presence of a solvent selected from the group consisting of a lower alkanol and an organic acid.
Dependencies are inferred from the claim text.