초록 ▼

The invention relates to a flavonoid ester. This flavonoid ester results from the reaction product of at least one flavonoid selected from the group consisting of a flavonoid with a ketone group in the 4-position, a salt, ester or ether of such a flavonoid, and a C-heteroside and/or O-heteroside der

The invention relates to a flavonoid ester. This flavonoid ester results from the reaction product of at least one flavonoid selected from the group consisting of a flavonoid with a ketone group in the 4-position, a salt, ester or ether of such a flavonoid, and a C-heteroside and/or O-heteroside derivative of such a flavonoid, with the proviso that this flavonoid contains at least one free alcohol group, with an organic monoacid having from 3 to 30 carbon atoms. These flavonoid esters constitute useful active principles for the manufacture of cosmetic, dermopharmaceutical, pharmaceutical, dietetic or agri-foodstuff compositions.

대표청구항 ▼

1. A method of providing cosmetic care comprising the topical application, to at least one zone of the skin of a person in need thereof, of a cosmetically effective amount of at least one flavonoid ester consisting essentially of the reaction product of:a) at least one flavonoid with a ketone group

1. A method of providing cosmetic care comprising the topical application, to at least one zone of the skin of a person in need thereof, of a cosmetically effective amount of at least one flavonoid ester consisting essentially of the reaction product of:a) at least one flavonoid with a ketone group in the 4-position, said flavonoid component being selected from the group consisting of a flavonoid with a ketone group in the 4-position, a salt of said flavonoid, an ester of said flavonoid, an ether of said flavonoid, a C-heteroside of said flavonoid, and an O-heteroside of said flavonoid, said flavonoid with a ketone group in the 4-position having the following structural chemical formula (I) or (II): [EQU2]in which:-the groups (OR1) to (OR4) are in any position on the ring; -in formula (I), A is a hydrogen atom, a substituent R, a group -OH or a group -OR, and in formula (II), A is a hydrogen atom, a substituent R, or a group -OH, R being as defined for the radicals R1 to R4; -n1 and n2, which are identical or different from one another, are integers from 0 to 4, the total of n1+n2 being equal to at most 4, corresponding to the maximum number of substitutions on the ring; -n3 and n4, which are identical or different from one another, are integers from 0 to 5, the total of n3 +n4 being equal to a maximum of 5, representing the maximum number of substitutions on the ring; and -R1, R2, R3 and R4 are each independently a hydrogen atom, an alkyl group having from 1 to 30 carbon atoms, an acyl group with an alkyl radical having from 1 to 30 carbon atoms, an ose unsubstituted, an ose substituted by a hydrocarbon chain having from 1 to 30 carbon atoms, under the proviso that at least one of the substituents R is a hydrogen atom, thereby defining one free hydroxyl group; and the isomers of said esters; withb) an organic monoacid having from 3 to 30 carbon atoms.