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Convenient polymer-supported synthetic route to heterobifunctional polyethylene glycols


, : Convenient polymer-supported synthetic route to heterobifunctional polyethylene glycols. Bioconjugate Chemistry 9(6): 842-846

Conventional synthesis of heterobifunctional poly(ethylene glycol) derivatives, especially of medium size, is a rather tedious task. A straightforward solid-phase methodology has been developed that is illustrated here by the synthesis of alpha-pyridyldithio-omega-hydroxy-poly(ethylene glycol)600. This derivative was prepared from resin-bound PEG600 with a global yield of 65% for 6 individual steps, i.e., with an average yield of 93%/step. Intermediate purification steps simply consisted of resin washing. Progress of each reaction toward completion could conveniently be monitored by 13C NMR of the resin-bound PEG derivatives. This example highlights both the versatility and efficiency of combining polymer-supported synthesis with direct 13C-NMR characterization of the intermediate compounds.

US$19.90

PMID: 9815180

DOI: 10.1021/bc980039h


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