On-resin solid-phase synthesis of asparagine N-linked glycopeptides: use of N-(2-acetoxy-4-methoxybenzyl)(AcHmb) aspartyl amide-bond protection to prevent unwanted aspartimide formation
作者:John Offer、Martin Quibell、Tony Johnson
DOI:10.1039/p19960000175
日期:——
enzyl)(AcHmb) backbone amide-protecting group has been applied in an on-resin solid-phase synthesis of asparagine N-linked glycopeptides. Backbone protection of the -Asp(OAllyl)-Ala-aspartyl amide bond suppressed the formation of aspartimide during both the initial chain assembly and the subsequent activation and glycosylation of the aspartyl β-carboxy group. A 1.1–1.25 mole excess of glycosylamine
A practical, convergent method for glycopeptide synthesis
作者:Shimon T. Cohen-Anisfeld、Peter T. Lansbury
DOI:10.1021/ja00076a010
日期:1993.11
Glycopeptides are useful compounds to model the conformational effects of the biosynthetic glycosylation of asparagine (N) residues in glycoproteins. We report herein a practical, convergent method for the synthesis of N-glycopeptides. The key reaction involves the acetylation of a β-glycosyl amine with a partially protected peptide. Commercially-available protected aminoacids and peptide-synthesis