A method for the production of enriched hop extracts having...

A - Human Necessities – 61 – K

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A61K 36/73 (2006.01) A61K 31/352 (2006.01) A61P 5/24 (2006.01) A61P 9/10 (2006.01) A61P 15/12 (2006.01) A61P 19/10 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2549662

The present invention relates to a method for the production of a hop extract which is enriched in 8-prenylnaringenin with respect to 6-prenylnaringenin, which method comprises the steps of subjecting a hop product to (1) an isomerisation reaction in the presence of water as a solvent and in the presence of an amount of a base and (2) to at least one extraction. In that way a hop extract may be extract is obtained which contains 6-prenylnaringenin and 8-~prenyinaringening in a ratio (8-prenylnaringenin x 100%)/(8- prenylnaringenin + 6~prenyInaringenin) of at least 50%. The extract preferably also contains xanthohumol, the weight ratio of xanthohumol to 8- prenylnaringenin being at least 10.

La présente invention a trait à un procédé de production d'un extrait de houblon qui est enrichi en 8-prénylnaringénine par rapport à la 6-prénylnaringénine, ledit procédé comprenant les étapes suivantes: le traitement d'un produit à base de houblon par (1) une réaction d'isomérisation en présence de l'eau comme solvant et en présence d'une quantité d'une base et (2) au moins une extraction. Ainsi, il est possible d'obtenir un extrait de houblon contenant de la 6-prénylnaringénine et de la 8-prénylnaringénine dans un rapport (8-prénylnaringénine x 100%)/(8-prénylnaringénine + 6-prénylnaringénine) d'au moins 50 %. De préférence, l'extrait contient également du xanthohumol, le rapport pondéral de xanthohumol à la 8-prénylnaringénine étant au moins de 10.

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