Backbone Amide Linker Strategy for the Synthesis of 1,4-Triazole-Containing Cyclic Tetra- and Pentapeptides
作者:Jasper Springer、Kimberly R. de Cuba、Sandrine Calvet-Vitale、Jan A. J. Geenevasen、Pedro H. H. Hermkens、Henk Hiemstra、Jan H. van Maarseveen
DOI:10.1002/ejoc.200800143
日期:2008.5
A backbone amide linker strategy was chosen for the solid-phase synthesis of triazole-containing Cyclic tetra- and pentapeptides. An alkyne-substituted linker derived from 4-hydroxy-2-methoxybenzaldehyde was elongated by using standard "Fmoc-based" solid phase chemistry and terminated by coupling of an azido acid. In solution, the peptides were cyclized by a Cu-1-catalyzed azide-alkyne cycloaddition
选择主链酰胺接头策略用于固相合成含三唑的环状四肽和五肽。衍生自 4-羟基-2-甲氧基苯甲醛的炔烃取代的接头通过使用标准的“基于 Fmoc”的固相化学延长并通过偶氮酸的偶联终止。在溶液中,肽通过 Cu-1 催化的叠氮化物-炔环加成反应环化。固体支持的合成线性肽必须在环化之前裂解。作为环状四肽的一个例子,环-[Pro-Val-Pro-Tyr] (2) 的三唑类似物是通过固相/溶液相方法制备的。对于环状五肽,选择 segetalin B (3) 作为模型化合物以显示该方法的适用性。