Process for manufacturing a diketone
AssigneeHoffmann-La Roche Inc.
InventorMax Schmid
Life of this patent
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Abstract
A process for producing dihydro-4,4-dimethyl-2,3-furandione by oxidizing dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone with a solid alkali metal hypochlorite or alkaline earth metal hypochlorite in an organic phase is disclosed.
Claims10
A process for manufacturing dihydro-4,4-dimethyl-2,3-furandione, which process comprises oxidizing dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone with a solid alkali metal hypochlorite or a solid alkaline earth metal hypochlorite, said oxidation occurring in a solvent in which dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone and dihydro-4,4-dimethyl-2,3-furandione are substantially soluble therein but in which said alkali-metal hypochlorite or alkaline earth metal hypochlorite is substantially insoluble therein.
A process for producing dihydro-4,4-dimethyl-2,3-furandione, comprising oxidizing dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone with an oxidizing agent selected from the group consisting of calcium hypochlorite, barium hypochlorite and lithium hypochlorite in a solvent selected from the group consisting of benzene, methylene chloride, chloroform and acetonitrile.
A process for the manufacture of dihydro-4,4-dimethyl-2,3-furandione, which process comprises oxidizing dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone with a solid alkali metal hypochlorite or alkaline earth metal hypochlorite in an organic phase.
Dependencies are inferred from the claim text.