A Sequential Route to Cyclopentenes from 1,6-Enynes and Diazo Ketones through Gold and Rhodium Catalysis
作者:Balaji S. Kale、Hsin-Fu Lee、Rai-Shung Liu
DOI:10.1002/adsc.201600980
日期:2017.2.2
aryl diazo ketones through two new reaction sequences involving initial gold‐catalyzed cyclization of 1,6‐enynes with diazo species, followed by rhodium‐catalyzed skeletal rearrangement of the resulting 3‐cyclopropyl‐2‐en‐1‐ones. In most instances the rhodium‐catalyzed reactions afforded cyclopentene derivatives whereas several n‐alkyl‐ or ortho‐substituted phenyl ketones delivered seven‐membered oxacycles
这项工作报告了通过两个新的反应序列,从1,6-炔烃和芳基重氮酮构建环戊烯核,这两个反应序列涉及最初的金催化的1,6-炔烃与重氮物质的环化反应,然后铑催化的所得3的骨架重排。 -cyclopropyl-2-en-1个。在大多数情况下,铑催化的反应提供了环戊烯衍生物,而几种正烷基或邻位取代的苯基酮则提供了七元的氧杂环。一个合理的机制为这两种截然不同的产品提供了理论依据。