Abstract
A new glycomonomer 1 containing a thioacetate group in the anomeric position and mimicking the thiosugar ligand of the gold-based drug auranofin was designed and synthesized in four steps from d-glucose. Both CPADB-mediated homopolymerization and chain extension of a hydrophilic poly(OEGMEMA) macroRAFT agent were well-controlled with dispersities (Đ) below 1.2, highlighting the suitability of thioacetate as a thiol protecting group in RAFT polymerization. Using the homopolymer as a test system, the thioacetate protective groups were selectively removed using hydrazine acetate, and AuPEt3Cl was subsequently complexed to the exposed thiols to generate a polymeric auranofin analogue with 52% complexation efficiency. Extension of this successful procedure to three block copolymers with differing hydrophobic block lengths, poly(OEGMEMA)34-b-poly(1)47, poly(F-OEGMEMA)32-b-poly(1)27, and poly(F-OEGMEMA)32-b-poly(1)7 (where “F” in the last two indicates the incorporation of 2 wt % fluorescein methacrylate into th...
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