Process for the production of conjugates from...

A - Human Necessities – 61 – K

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A61K 47/48 (2006.01)

Patent

CA 2555467

The invention relates to a method for producing a conjugate of a polynucleotide and a polysaccharide, said method comprising the following steps: a) an aldonic acid of the polysaccharide or a derivative thereof is provided; b) the aldonic acid is reacted with an alcohol derivative, preferably a carbonate derivative of an alcohol, to form an aldonic acid ester, preferably an activated aldonic acid ester; and c) the aldonic acid ester is reacted with the polynucleotide, said polynucleotide comprising a functional amino group. The aldonic acid is reacted with the alcohol derivative in step (b) in a dry aprotic polar solvent.

L'invention concerne un procédé pour produire un conjugué constitué d'un polynucléotide et d'un polysaccharide, ce procédé comprenant les étapes qui consistent : a) à fournir un acide aldonique du polysaccharide ou d'un dérivé correspondant ; b) à faire réagir l'acide aldonique avec un dérivé d'alcool, de préférence un dérivé carbonate d'un alcool, pour obtenir un ester de l'acide aldonique, de préférence un ester activé de l'acide aldonique, et ; c) à faire réagir l'ester de l'acide aldonique avec le polynucléotide, ledit polynucléotide comportant un groupe amino fonctionnel. Cette invention est caractérisée en ce que la réaction entre l'acide aldonique et le dérivé d'alcool au cours de l'étape b) a lieu dans un solvant polaire aprotique sec.

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