Rapid Combinatorial Access to Macrocyclic Ansapeptoids and Ansapeptides with Natural-Product-like Core Structures
作者:Ludger Wessjohann、Michiel de Greef、Sahan Abeln、Khalid Belkasmi、Alexander Dömling、Romano Orru
DOI:10.1055/s-2006-950335
日期:2006.12
with biological relevance. A rapid synthesis of the core structure is conceivable by a combination of an Ugi four-component reaction with bifunctional building blocks to form the dipeptoid part, followed by a suitable macrocyclization reaction. The latter step is crucial, and an uncommon macroetherification gave the best results. The use of ammonium salts allows direct access to peptides instead of peptoids
14 成员 ansa-cyclopeptide 生物碱是最丰富的天然大环化合物之一,因此是具有生物学相关性的面向多样性的合成的宝贵模板。通过将 Ugi 四组分反应与双功能结构单元结合以形成二肽部分,然后进行合适的大环化反应,可以快速合成核心结构。后一步至关重要,不常见的宏观醚化产生了最好的结果。铵盐的使用允许直接获得肽而不是类肽。根据取代模式,尽管亚苯基自由旋转,一些环肽仍显示出平面手性。© Georg Thieme Verlag 斯图加特。