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Postpolymerization Modification Using Less Cytotoxic Activated Ester Polymers for the Synthesis of Biological Active Polymers
journal contribution
posted on 2014-08-11, 00:00 authored by Lirong He, Kristina Szameit, Hui Zhao, Ulrich Hahn, Patrick TheatoActivated ester polymers, pioneered
by Ferruti and Ringsdorf in
the 1970s, are attractive polymeric materials because they can easily
be converted into functional polymers by reacting with amine nucleophiles.
In the present study, methyl salicylate acrylate, salicyl acrylate,
and tert-butyl salicylate acrylate monomers were
polymerized yielding three novel reactive precursors suitable for
the postpolymerization modification with primary and secondary amines.
The reactivities of poly(pentafluorophenyl acrylate), poly(methyl
salicylate acrylic ester), and poly(salicyl acrylate) toward amines
were compared by kinetic studies and revealed the practical applicability
of salicylic acid based derivatives for efficient postpolymerization
modifications. In addition, in vitro cytotoxicity of water-soluble
leaving groups, pentafluorophenol and salicylic acid, as well as water-soluble
polymers containing the respective activated ester groups were investigated
using HeLa cells. In short, compared to the frequently used poly(pentafluorophenyl
acrylate), poly(salicyl acrylate) activated ester feature a lower
reactivity, but exhibit less cytotoxicity. In this respect, poly(salicyl
acrylate) as reactive precursor polymers may become alternative routes
for the synthesis of functional polyacrylamides when it comes to advanced
applications in vivo.
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novel reactive precursorsreactive precursor polymersester featurePostpolymerization Modificationmethyl salicylate acrylateester groupsPolymersActivated ester polymersalternative routessalicyl acrylateCytotoxic Activated Ester Polymersamine nucleophilesHeLa cellspostpolymerization modificationspostpolymerization modification
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