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US 8,299,275 B2Granted
Process for producing carnosol from carnosic acid using hydrogen peroxide or peracids
AssigneeDsm IP Assets B.V.
InventorsAndreas Kleefeldt, Christof Wehrli
Life of this patent
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Abstract
Catalytic processes for the production of carnosol from carnosic acid using hydrogen peroxide or a peracid are presented. The carnosic acid may be in pure form, in an impure form, part of a plant extract, or may be present in rosemary needles. The catalyst may be iron, iron salts, a minor amount of water, rosemary needles, or a mixture thereof.
Claims11
A process for converting carnosic acid to carnosol comprising the steps of:
- a) exposing carnosic acid to a solvent comprising a catalyst selected from the group consisting of minor amounts iron, iron salt, rosemary needles and mixtures thereof, and
- b) introducing a peracid oxidation agent to produce carnosol.
Dependencies are inferred from the claim text.