Exploration of Ring-Closing Enyne Metathesis for the Synthesis of Azonino[5,4-<i>b</i>]indoles
作者:Daniel Solé、M.-Lluïsa Bennasar、Tomàs Roca、Magdalena Valldosera
DOI:10.1002/ejoc.201501517
日期:2016.3
ring-closing enyne metathesis (RCEYM) as a methodology for the synthesis of the azonino[5,4-b]indole system, featuring the tricyclic substructure of the alkaloids cleavamine and quebrachamine, has been explored. Three series of enyne substrates were studied for their compatibility with the RCEYM reaction. In addition to the usual substrates bearing either a terminal or an internal alkyne, for the first
已经探索了使用闭环烯炔复分解 (RCEYM) 作为合成 azonino[5,4-b] 吲哚系统的方法,该系统具有生物碱 cleavamine 和 quebrachamine 的三环亚结构。研究了三个系列的烯炔底物与 RCEYM 反应的相容性。除了带有末端或内部炔烃的常用底物外,还首次考虑了带有炔基卤化物部分的烯炔。尽管复分解环化允许在所有三个系列中组装 azoninoindole 核,但仅注意到内部炔烃底物的有效催化循环。根据实验结果,“yne-then-ene”途径似乎是这些反应中起作用的机制。