Continuous flow homogeneous alkene metathesis with built-in catalyst separation
作者:Rubén Duque、Eva Öchsner、Hervé Clavier、Fréderic Caijo、Steven P. Nolan、Marc Mauduit、David J. Cole-Hamilton
DOI:10.1039/c1gc15048k
日期:——
Continuous flow homogeneous alkenemetathesis using a supported ionic liquid phase (SILP) catalyst with CO2 as a transport vector allows the self-metathesis of methyl oleate with only a slight loss of activity for at least 10 h; cross-metathesis of dimethyl maleate with methyl oleate ceases after 3 h, but the catalyst remains active for methyl oleate metathesis. The reasons for this unusual behaviour
Cross-Metathesis of Biosourced Fatty Acid Derivatives: A Step Further Toward Improved Reactivity
作者:Paul Vignon、Tom Vancompernolle、Jean-Luc Couturier、Jean-Luc Dubois、André Mortreux、Régis M. Gauvin
DOI:10.1002/cssc.201403170
日期:2015.4.13
fatty acid derivatives, is presented. The targeted reaction is ruthenium‐catalyzed cross‐metathesis with functionalized olefins (α,β‐unsaturated esters), that affords shorter diesters. These can be used as biosourced (pre)monomers for the production of polyesters. It is demonstrated that switch from terminal to internal cross‐metathesis partners (that is, from methylacrylate to methyl crotonate) allows
Improved cross-metathesis of acrylate esters catalyzed by 2nd generation ruthenium carbene complexes
作者:Grant S. Forman、Robert P. Tooze
DOI:10.1016/j.jorganchem.2005.07.107
日期:2005.12
The performance of cross-metathesis reactions between acrylate esters and olefins catalyzed by Grubbs catalysts have been enhanced by the simple addition of p-cresol. For example, the efficiency of the cross metathesis reaction between methyl acrylate and 1-decene catalyzed by 2 was significantly increased by addition of p-cresol to the reaction mixture, resulting in increased product yields and E/Z ratios. (c) 2005 Elsevier B.V. All rights reserved.
Magnetic Nanoparticle Supported Second Generation Hoveyda-Grubbs Catalyst for Metathesis of Unsaturated Fatty Acid Esters
作者:Zhu Yinghuai、Loo Kuijin、Ng Huimin、Li Chuanzhao、Ludger Paul Stubbs、Chia Fu Siong、Tan Muihua、Ship Chee Peng
DOI:10.1002/adsc.200900370
日期:2009.11
The Hoveyda–Grubbs catalyst has been successfully immobilized on surface-modified magnetic nanoparticles with a loading amount of 0.28 mmol ruthenium/g (magnetic support). The supported catalysts were active for the self-metathesis of methyl oleate and macro-monomer in a quantitative conversion, respectively. In addition, the catalyst can be easily separated by using a magnet and reused several times