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。
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.
Novel Reactions of Ethylene Acetals with Silyl-Substituted Nucleophiles. A Mild and Efficient Procedure for the Synthesis of Homoallyl Alkyl Ethers and Unsymmetrical Dialkyl Ethers
作者:Takeshi Suzuki、Takeshi Oriyama
DOI:10.1080/00397919908086101
日期:1999.4
Abstract Efficient one-pot synthesis of homoallyl alkyl ethers and dialkyl ethers was performed by the allylation and reduction of ethyleneacetals with allyltrimethylsilane and f-butyldimethylsilane, respectively, in the presence of alkoxytrimethylsilane.
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