Medicinal compositions and method for the preparation thereof

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 63/91 (2006.01) A61K 9/00 (2006.01) A61K 9/16 (2006.01) A61K 47/34 (2006.01) A61K 47/48 (2006.01)

Patent

CA 2552139

Methods for the manufacture of medicinal compositions are described. A method for the manufacture of a medicinal composition according to the invention comprises: (a) Providing a biocompatible polymer of the general formula -[O-- R1--C(O)]n- wherein: "R1" is a linear, branched, or cyclic organic group, "n" is at least three, (b) Acylating the biocompatible polymer to provide an acylated biocompatible polymer and a mixed anhydride; (c) Reacting the mixed anhydride with a nucleophile to provide an acylated biocompatible polymer with a terminal carboxylic acid derivative capable of being chemically converted to an acid in the absence of water; (d) Converting the terminal carboxylic acid derivative to an acylated biocompatible polymer with a terminal carboxylic acid; and (e) Combining the acylated biocompatible polymer with a drug to provide the medicinal composition.

L'invention concerne des procédés d'élaboration de compositions médicinales. Selon ladite invention, un procédé d'élaboration d'une composition médicinale consiste (a) à engendrer un polymère biocompatible de formule générale -[O--R?1¿--C(O)]¿n?-, dans laquelle "R?1¿" représente un groupe organique linéaire, ramifié ou cyclique, "n" est au moins égal à trois, (b) à acyler le polymère biocompatible afin de produire un polymère biocompatible acylé et un anhydride mélangé, (c) à faire réagir l'anhydride mélangé avec un nucléophile de manière à engendrer un polymère biocompatible acylé avec un dérivé d'acide carboxylique de terminaison qui peut être chimiquement converti en acide en l'absence d'eau, (d) à convertir le dérivé d'acide carboxylique de terminaison en un polymère biocompatible acylé avec un acide carboxylique à terminaison, et (e) à combiner le polymère biocompatible acylé avec un médicament en vue de produire la composition médicinale.

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