Extrapolation of the gold-catalyzed cycloisomerization to the palladium-catalyzed cross-coupling/cycloisomerization of acetylenic alcohols for the synthesis of polysubstituted furans: Scope and application to tandem processes
作者:Chandrasekar Praveen、Paramasivan T. Perumal
DOI:10.1016/s1872-2067(15)60994-9
日期:2016.2
of diverse furan derivatives from acetylenic alcohols by gold and palladium catalyzed π-activation chemistry. Notably, this new method was found to be amenable to cyclooctyl-containing substrates, which represents a significant extension to this methodology compared with our previous reports. Furthermore, this newly developed method allowed for the direct construction of cyclooctyl furans from their
摘要 本文描述了通过金和钯催化的 π 活化化学从炔醇制备多种呋喃衍生物的综合方法的发展。值得注意的是,发现这种新方法适用于含环辛基的底物,与我们之前的报告相比,这代表了对该方法的显着扩展。此外,这种新开发的方法允许在 Sonogashira 条件下从其合成前体直接构建环辛基呋喃。实验结果表明,钯在这些反应中起两个主要作用,包括(1)底物交叉偶联反应中必不可少的催化剂;(2) 通过典型的 π 活化过程促进炔醇中间体的环化。3-碘呋喃的一锅合成强调了这种化学的范围,这为进一步功能化(通过偶联方法)提供了机会。最后,AuBr 3 协议还详细阐述了多米诺环化/C-H 活化反应,以及无环前体的环化。总之,这项研究的结果表明,金和钯催化剂可用于在环化反应中相互补充。