The phenacyl group as an efficient thiol protecting group in a peptide condensation reaction by the thioester method
作者:Hidekazu Katayama、Hironobu Hojo
DOI:10.1039/c3ob40644j
日期:——
preparation of long-chain peptides, the so-called thioester method requires protecting groups for amino and thiol groups for regioselective ligation. In this study, we demonstrated that the phenacyl (Pac) group acts as an efficient protecting group of cysteine side chains. We synthesized a cysteine derivative carrying the Pac group at the side chain sulfur atom, and Pac-containing peptides and peptide thioesters
制备长链肽的缩合方法之一,所谓的硫酯法需要氨基的保护基和区域选择性连接的硫醇基。在这项研究中,我们证明了苯甲酰基(Pac)基团是半胱氨酸侧链的有效保护基团。我们合成了在侧链硫原子上带有Pac基团的半胱氨酸衍生物,并通过常规的基于9-芴基甲氧基羰基(Fmoc)的固相肽合成策略,使用该衍生物合成了含Pac的肽和肽硫酯。含Pac的肽段可以通过硫酯方法进行缩合。缩合反应后,可通过Zn / AcOH处理除去Pac基团。此外,用于保护赖氨酸侧链的叠氮基团