Solution- and solid-phase syntheses of guanidine-bridged, water-soluble linkers for multivalent ligand design.
2004
Efficient syntheses of guanidine-bridged poly(ethylene glycol) linkers of various lengths in fully protected form are reported for both solution- and solid-phase protocols. The application of such linkers in the construction of water-soluble and high-affinity multivalent ligands against cholera toxin is demonstrated. Synthetic intermediates for multivalent ligands as large as 20 kDa in molecular weight have been assembled using presynthesized linkers. The final ligands are highly water-soluble, thus enabling proper biophysical characterization.
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