Abstract
A novel, highly efficient methodology to synthesize gradient glycopolymers has been successfully developed involving concurrent enzymatic monomer transformation and reversible addition–fragmentation chain transfer (RAFT) polymerization. By synchronizing enzymatic monomer transformation with polymerization, a continuous supply of the second monomer (glycomonomer) is achieved during the polymerization, resulting in a gradient sugar distribution in the final polymer. Detailed studies of the process using GPC and NMR indicate that the gradient glycopolymers synthesized by RAFT were well controlled. Subsequently, 1,2:3,4-di-O-isopropylidene-6-O-methacryloyl-α-d-galactopyranose (DIMAG) moieties were deprotected to regenerate the sugar and achieve amphiphilic bioactive glycopolymers. We demonstrate the synthesis of a set of glycopolymers with different sequential structures, such as statistical, gradient and block glycopolymers. The glycopolymers with block structure show higher affinities toward the RCA120 lect...
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