Abstract: The present invention relates to an efficient method for producing naringenin derivatives from xanthohumol or derivatives thereof. In particular, the method according to the present invention provides the production of isoxanthohumol, for example also in enantiomer-enriched form, from xanthohumol and subsequent demethylation of isoxanthohumol according to specific procedures obtaining corresponding naringenin derivatives, such as, in particular, 8-prenylnaringenin.

Abstract: A process is specified by which the xanthohumol present in hops can be isolated in high yield in an economical manner. In the process an ethanol pure resin extract is first extracted with a liquid or supercritical solvent in which the xanthohumol is insoluble and the resultant extraction residue is first washed with a first solvent mixture and then the extraction residue which has been washed with the first solvent mixture is, after removing the first solvent mixture, extracted with a second solvent mixture, the first solvent mixture having a higher polarity than the second solvent mixture. The hop extract produced from the second solvent mixture has a xanthohumol content of at least 85% by weight.