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Updated: Apr 30, 2026

Microwave-assisted Functionalization of Polyethylene glycol and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
Published on: October 29, 2013
Keto-Functionalized Polymer Scaffolds As Versatile Precursors to Polymer Side Chain Conjugates
Jingquan Liu1, Ronald C Li2, Gregory J Sand2
1Department of Chemistry and Biochemistry & California Nanosystems Institute, University of California, Los Angeles, CA 90095-1569, USA ; Centre for Advanced Macromolecular Design, School of Chemical Sciences and Engineering, The University of New South Wales NSW 2052.
Abstract:
A new methacrylate monomer with a reactive ketone side-chain, 2-(4-oxo-pentanoate) ethyl methacrylate (PAEMA), was synthesized and subsequently polymerized by reversible addition-fragmentation chain transfer (RAFT) polymerization to give a polymer with a narrow molecular weight distribution (PDI = 1.25). The polymer was chain extended with poly(ethylene glycol methyl ether acrylate) (PEGMA) to yield a block copolymer. Aminooxy containing small molecules and oligoethylene glycol were conjugated to the ketone functionality of the side chain in high yields. Cytotoxicity of the oxime-linked tetra(ethylene glycol) polymer to mouse fibroblast cells was investigated; the polymer was found to be non-cytotoxic up to 1 mg/mL. The ease with which this polymer is functionalized, suggests that it may be useful in forming tailored polymeric medicines.
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