Olefin Metathesis−Iodoetherification−Dehydroiodination Strategy for Spiroketal Subunits of Polyether Antibiotics
作者:Kurissery A. Tony、Darrin Dabideen、Jialiang Li、Maria Dolores Díaz-Hernández、Jesús Jiménez-Barbero、David R. Mootoo
DOI:10.1021/jo9014722
日期:2009.10.16
The convergent synthesis of two pentacyclic analogues of the polyether monensin A is described. Although different with respect to the configuration of the alcohol at the 3 position of the six-membered ring of the spiroketal subunit, the configuration at the acetal center in both structures is unchanged and is consistent with the anomeric effect. The key synthetic steps are the coupling of two complex
描述了聚醚莫能菌素 A 的两个五环类似物的聚合合成。尽管在螺缩醛亚基的六元环的 3 位上醇的构型不同,但两种结构中缩醛中心的构型没有变化,并且与异头效应一致。关键的合成步骤是通过烯烃复分解将两个复杂链段偶联,然后通过碘醚化-脱氢碘化序列将二羟基烯烃转化为螺缩酮。这些转换与各种功能组的兼容性使得整体策略适用于高度取代的框架。