Centre National De La Recherche Scientifique

Universitè De Montpellier

Institut National De La Recherche Agronomique

Ecole Nationale Superieure De Chimie De Montpellier

Centre International D'etudes Superieures En Sciences Agronomiques

Hélène Fulcrand

Bernard Boutevin

Sylvain Caillol

Eric Dubreucq

Carine Burguiere

Chahinez Aouf

Hélène Nouailhas

Laurent Roumeas

Sylvie Rapior

A compound of general formula (I) in which R, R, Rand R, identical or different, each represent a hydrogen atom or a hydroxyl group, optionally protected by a protecting group. Rrepresents a hydrogen atom or an &#x2014;ORgroup, in which Rrepresents a hydrogen atom, a protecting group or a gallate group. Rrepresents a hydroxyl group, optionally protected by a protecting group. R', R&#x2032;, R&#x2032;and R&#x2032;, 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&#x2032;, R&#x2032;, R&#x2032;and R&#x2032;representing the covalent bond with the pyran ring or one of the salts of same. A method for obtaining such a compound includes a step of depolymerization of condensed tannins in the presence of an acid by means of a nucleophile derived from furan. 

Flavonoid derivative compounds and method for preparing same by depolymerization of condensed tannins

The present application relates to a method for preparing epoxy resins from a mixture of epoxidized phenolic compounds, wherein said epoxidized phenolic compounds are obtained by the epoxidation of natural phenolic compounds selected from the group comprising simple phenol, acid-phenol, coumarin, naphthoquinone, stillbenoid, flavonoid, isoflavanoid, anthocyanin, condensed tannin and hydrolyzable tannin.

Methods for producing thermosetting epoxy resins

Growing community of inventors

Saint Gely du Fesc, France

Hélène Fulcrand