本文描述了一种新型的钌催化串联闭环复分解(RCM)双键异构化反应。证明了该方法对五元,六元和七元环状烯醇醚的有效合成的效用。它依赖于易位活性钌卡宾物质到原位异构化活性钌氢化物物质的转化。通过使用各种添加剂可以实现这种转化。讨论了不同方案的范围和局限性,并基于31 P和1 H NMR光谱学研究提出了一些机械方面的考虑。
In situ conversion of a Ru metathesis catalyst to an isomerization catalystElectronic supplementary information (ESI) available: representative experimental procedure and analytical data for products 3. See http://www.rsc.org/suppdata/cc/b4/b400229f/
作者:Bernd Schmidt
DOI:10.1039/b400229f
日期:——
Addition of alcohols and substoichiometric amounts of a base to a metathesis reaction induces conversion of the metathesis-active carbene catalyst to an isomerization-active hydride species.
在复分解反应中加入醇和亚几何量的碱,可促使具有复分解活性的碳烯催化剂转化为具有异构化活性的氢化物。
An Olefin Metathesis/Double Bond Isomerization Sequence Catalyzed by an In Situ Generated Ruthenium Hydride Species
New Tandem Catalysis: Preparation of Cyclic Enol Ethers through a Ruthenium-Catalyzed Ring-Closing Metathesis−Olefin Isomerization Sequence
作者:Amanda E. Sutton、Benjamin A. Seigal、David F. Finnegan、Marc L. Snapper
DOI:10.1021/ja028044q
日期:2002.11.1
Tandem reactions that proceed with a single metal catalyst precursor offer novel opportunities for developing efficient new reaction sequences. In this regard, reaction conditions have been identified that allows for a tandemring-closing metathesis-olefin isomerizationsequence catalyzed by a common ruthenium precursor. Specifically, the tandem process generates cyclic enol ethers from a variety of
The ring-closing metathesis of vinyl ethers with Grubbs' catalyst for the synthesis of dihydropyrans
作者:Claudio F. Sturino、Jerome C.Y. Wong
DOI:10.1016/s0040-4039(98)02205-9
日期:1998.12
A series of acyclic vinyl ethers have been prepared and treated with Grubbs' ruthenium catalyst ((Cy3P)(2)RuCl2=CHPh). Contrary to previous findings, it has been shown that certain vinyl ethers are excellent substrates for the ring closing metathesis with ruthenium based catalysts. (C) 1998 Elsevier Science Ltd. All rights reserved.
tandem ring-closingmetathesis (RCM) double-bond isomerization reaction is described in this paper. The utility of this method for the efficient syntheses of five-, six-, and seven-membered cyclic enol ethers is demonstrated. It relies on the conversion of a metathesis-active rutheniumcarbene species to an isomerization-active ruthenium−hydride species in situ. This conversion is achieved by using various
本文描述了一种新型的钌催化串联闭环复分解(RCM)双键异构化反应。证明了该方法对五元,六元和七元环状烯醇醚的有效合成的效用。它依赖于易位活性钌卡宾物质到原位异构化活性钌氢化物物质的转化。通过使用各种添加剂可以实现这种转化。讨论了不同方案的范围和局限性,并基于31 P和1 H NMR光谱学研究提出了一些机械方面的考虑。