New cross-linked derivatives of hyaluronic acid

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 37/08 (2006.01) A61K 9/16 (2006.01) A61K 47/36 (2006.01) A61L 24/08 (2006.01) A61L 27/20 (2006.01) A61L 31/04 (2006.01)

Patent

CA 2423384

The present invention describes a new class of cross-linked derivatives of partially N-deacetylated hyaluronic acid or derivatives thereof, comprising at least one repeating unit of formula (I) hereinafter depicted and a process for the preparation of said cross-linked derivatives, comprising a multicomponent condensation reaction involving the carboxy groups and the amino groups originating from a partial N-deacetylation of hyaluronic acid or derivatives, together with an aldeyde and an isocyanide. The derivatives thus obtained can be used, alone or in association with biologically and/or pharmacologically active substances, for the preparation of pharmaceutical compositions, biomaterials, surgical and healthcare articles, slow release systems and for the coating of biomedical objects.

L'invention concerne une nouvelle classe de dérivés réticulés d'acide hyaluronique partiellement N-désacétylé ou de ses dérivés, comprenant au moins une unité de répétition de la formule (I) représentée dans le descriptif, ainsi qu'un procédé de préparation desdits dérivés réticulés, qui consiste en une réaction de condensation à plusieurs composants impliquant les groupes carboxy et amino issus d'une N-désacétylation partielle de l'acide hyaluronique ou de ses dérivés, ainsi qu'un aldéhyde et un isocyanure. Les dérivés ainsi obtenus peuvent être utilisés seuls ou en association avec des substances pharmaceutiquement et/ou biologiquement actives pour la préparation de compositions pharmaceutiques, de biomatériaux, d'articles chirurgicaux et de soins de santé, de systèmes à libération lente ainsi que pour le revêtement d'objets biomédicaux.

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