Electrophilic Cyclization of Aryldiacetylenes in the Synthesis of Functionalized Enediynes Fused to a Heterocyclic Core
作者:N. A. Danilkina、A. E. Kulyashova、A. F. Khlebnikov、S. Bräse、I. A. Balova
DOI:10.1021/jo501396s
日期:2014.10.3
variety of asymmetrically substituted acyclic enediynes fused to heterocycles. The tolerance of the developed methodology to a variety of functional groups is a great advantage in the synthesis of macrocyclic enediyne systems fused to a heterocyclic core. Synthesis of indole-fused 12-membered macrocyclic dienediyne was achieved using ring-closing metathesis as a key step.
开发了一种有效的策略,用于合成与苯并噻吩,苯并呋喃和吲哚稠合的不对称取代烯二炔。所提出的方法基于联乙炔的亲电环化和Sonogashira偶联。因此,易得邻位的碘环化-官能化的(buta-1,3-diynyl)芳烃被用作合成2-ethynyl-3-iodoheteroindeness的直接方法。这些底物及其修饰的衍生物很容易通过Sonogashira与乙炔的偶合转化为稠合到杂环上的各种不对称取代的无环烯二炔。所开发的方法对各种官能团的耐受性是在稠合至杂环核心的大环烯二炔系统合成中的巨大优势。以闭环复分解为关键步骤,完成了吲哚稠合的12元大环二烯二炔的合成。