A process for the preparation of poly-alfa-glutamic acid and...

C - Chemistry – Metallurgy – 08 – G

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C08G 69/00 (2006.01) C08G 69/48 (2006.01) C07K 1/00 (2006.01)

Patent

CA 2656077

The invention relates to an improved process for the preparation of poly-.alpha.-glutamic acids which comprises the polymerisation of tertiary .gamma.-esters of .alpha.-glutamic acid N-carboxy anhydride with appropriate solvents and initiators, followed by acid hydrolysis of the resulting poly-.alpha.-glutamic acid-.gamma.-ester. The process is particularly advantageous in that it allows to carefully control the molecular weight of the resulting poly-.alpha.-glutamic acid. The invention also relates to poly-.alpha.-glutamic acids capped at the amino terminus with carboxylic acids or amino acids and to a process for the preparation thereof.

L'invention concerne un procédé amélioré pour la préparation d'acides poly-.alpha.-glutamiques, comprenant la polymérisation de .gamma.-esters tertiaires d'acide .alpha.-glutamique N-carboxy anhydride avec des solvants et des initiateurs appropriés, suivie d'une hydrolyse acide du .gamma.-ester de l'acide poly-.alpha.-glutamique résultant. Le procédé est particulièrement avantageux par le fait qu'il permet un contrôle soigneux de la masse moléculaire de l'acide poly-.alpha.-glutamique résultant. L'invention concerne également des acides poly-.alpha.-glutamiques coiffés à l'extrémité terminale amino par des acides carboxyliques ou des acides aminés, ainsi qu'un procédé permettant de les préparer.

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