On-Resin Click-Glycoconjugationof Peptoids

Abstract

Peptoids are unnatural peptide-like oligomers having the side-chain attached to the glycine nitrogen. In order to investigate how such oligomers are affected upon glycoconjugation, a series of glycosylated peptoids has been synthesized. The conjugation between glycosyl residue and peptoid was achieved by azide + alkyne [3+2] cycloaddition (click reaction). The glycosylated peptoids were obtained by either stepwise assembly from sarcosine and glycosylated monomers or global on-resin click glycoconjugation. CD spectroscopic studies were performed on both unglycosylated and glycosylated peptoids with varying chain-length, revealing length and substituent dependences. Additionally, three peptoids were tested for antifreeze activity.