Volume 46, Issue 15 pp. 5053-5063
Article

Ways of selective polycondensation of L-lysine towards linear α- and ε-poly-L-lysine

Chau Hon Ho

Chau Hon Ho

Department of Chemistry, Freiburg Materials Research Center and Institute for Macromolecular Chemistry, Albert-Ludwigs-Universitaet Freiburg, Stefan-Meier-Str. 21, D-79104 Freiburg, Germany

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Erich Odermatt

Erich Odermatt

Aesculap AG & Co. KG, Am Aesculap-Platz, D-78532 Tuttlingen, Germany

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Ingo Berndt

Ingo Berndt

Aesculap AG & Co. KG, Am Aesculap-Platz, D-78532 Tuttlingen, Germany

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Joerg C. Tiller

Corresponding Author

Joerg C. Tiller

Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Str. 66, D-44227 Dortmund, Germany

Department of Bio- and Chemical Engineering, TU Dortmund, Emil-Figge-Str. 66, D-44227 Dortmund, GermanySearch for more papers by this author
First published: 17 June 2008
Citations: 15

Abstract

Polylysines (PL) are highly interesting polymers due to their biocompatibility and their high number of reactive amino groups. So far it was not possible to synthesize them directly from L-lysine. Here, we describe two different synthesis routes to selectively polymerize lysine in one batch without the use of protection groups. Applying 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide as activating agent for the polycondensation of L-lysine in water gave selectively linear ε-PLL. In contrast to this, the polymerization of L-lysine in chloroform in the presence of dicyclohexyl carbodiimide and 18-crown-6 ether selectively afforded pure α-PLL. We also assessed the capability of polylysine derivatization by polymer analog reactions with acetic anhydride, methyl iodide and 2,4,6-trinitrobenzenesulfonic acid. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5053–5063, 2008

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