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