FLAVONOID DERIVATIVE COMPOUNDS AND METHOD FOR PREPARING SAME BY DEPOLYMERISATION OF CONDENSED TANNINS

摘要

The invention concerns a compound of general formula (I) in which R1, R2, R3 and R5, identical or different, each represent a hydrogen atom or a hydroxyl group, optionally protected by a protecting group; R4 represents a hydrogen atom or an -OR7 group, in which R7 represents a hydrogen atom, a protecting group or a gallate group; R6 represents a hydroxyl group, optionally protected by a protecting group; and R'1, R'2, R'3 and R'4, identical or different, each represent a hydrogen atom or a substituent not comprising a mesomeric electron withdrawing group conjugated with the furan ring, a substituent from R'1, R'2, R'3 and R'4 representing the covalent bond with the pyran ring; or one of the salts of same. A method for obtaining such a compound comprises a step of depolymerisation of condensed tannins in the presence of an acid by means of a nucleophile derived from furan.