.alpha.-glycosyl quercetin, and its preparation and uses

Details .alpha.-glycosyl quercetin, and its preparation and uses .alpha.-glycosyl quercetin, and its preparation and uses

1995-02-15

1996-10-15

Rollins, John W.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Carbohydrate doai

536 8, 536124, 435 75, 435 96, 435 97, 435 99, A61K 3170, C07H 1524, C12P 1918, C12P 1914

Patent

active

055654355

ABSTRACT:
A novel .alpha.-glycosyl quercetin, wherein at least equimolar D-glucose residues are attached to quercetin via the .alpha.-bond, has a satisfactory water-solubility, light tolerance and stability, and exerts the inherent activity of quercetin in vivo. The .alpha.-glycosyl quercetin is prepared by a process comprising subjecting a solution containing quercetin and an .alpha.-glucosyl saccharide to the action of a saccharide-transferring enzyme to form an .alpha.-glycosyl quercetin, and recoverying the resultant .alpha.-glycosyl quercetin. The .alpha.-glycosyl quercetin can be advantageously used in combination with other materials in food products, cosmetic compositions and pharmaceutical compositions as a highly-safe and natural vitamin P-enriched agent, yellow-color-imparting agent, antioxidant, deodorant, stabilizer, quality-improving agent, antiseptic, prophylactic agent, therapeutic agent and ultraviolet-absorbing agent.

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Chemical Abstracts, vol. 99, Oct. 10, 1983. p. 380, abstract No. 119306p.
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Natural Therapeutics "Propolis", 2nd revised edition; by Dr. Yves Donadieu, 1983.

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