Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1984-03-29
1986-05-27
Love, Ethel G.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
549403, A61K 3135, C07D31132
Patent
active
045916004
ABSTRACT:
This invention relates to quercetin or fisetin derivatives substituted on the oxygen in the 3 position by groups such as lower alkyl, cycloalkyl, methanesulfonyl or paratoluenesulfonyl.
The derivatives substituted by methanesulfonyl or paratoluenesulfonyl are obtained from a 3-O-glycoside whose phenol OH groups are blocked in the form of benzoate, and from which the OH in the 3 position is released by the action of concentrated HCl; this OH is esterified by mesityl chloride or paratoluenesulfonic acid chloride, and the benzoate groups are eliminated by soda treatment. The O derivatives substituted by alkyl or cycloakyl are prepared from a suitably substituted acetonitrile or metadiphenol; the resulting derivative reacts with 3,4-dibenzyloxybenzoic acid and the resulting flavone is debenzylated by hydrogenolysis.
The derivatives, object of this invention, are useful in preventive or curative therapy of ocular and nervous complications from diabetes and are also useful as hypolipidemic or hypoglycemic agents.
REFERENCES:
patent: 2892845 (1959-06-01), Jurd
patent: 2892846 (1959-06-01), Jurd
patent: 3450717 (1969-06-01), Kramer et al.
patent: 4532254 (1985-07-01), Okuda et al.
Creuzet Marie-Helene
Feniou Claude
Guichard Francoise
Mosser Jacqueline
Pontagnier Henri
Love Ethel G.
Societe Cortial S.A.
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