Total Synthesis of Cyclotheonamide C by Use of an α-Keto Cyanophosphorane Methodology for Peptide Assembly
作者:Stéphane P. Roche、Sophie Faure、Lahssen El Blidi、David J. Aitken
DOI:10.1002/ejoc.200800591
日期:2008.10
The totalsynthesis of cyclotheonamideC (3), a macrocyclic pentapeptide incorporating an alpha-keto homoarginine (k-Arg) and a vinylogous dehydrotyrosine (V-deltaTyr) unit, has been achieved. For comparison of macrocyclisation feasibility, two linear pentapeptides bearing free ketone functions at the k-Arg units were prepared, by use of tandem oxidation/coupling reactions on alpha-keto cyanophosphorane
Cyclotheonamide C (3) 的全合成已经实现,这是一种大环五肽,结合了 α-酮基高精氨酸 (k-Arg) 和乙烯基脱氢酪氨酸 (V-deltaTyr) 单元。为了比较大环化的可行性,通过使用α-酮基氰基正膦前体的串联氧化/偶联反应作为制备五肽的关键过程,制备了两种在 k-Arg 单元上带有游离酮功能的线性五肽。五肽 V-deltaTyr C 末端的成功激活和偶联导致目标分子核心,从而提供了目标化合物的短全合成