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Updated: May 17, 2026
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
A fast-initiating ionically tagged ruthenium complex: a robust supported pre-catalyst for batch-process and
Etienne Borré1, Mathieu Rouen, Isabelle Laurent
1Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Av. du Général Leclerc, CS 50837, 35708 Rennes Cedex 7, France.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 24, 2012
Summary
A novel pyridinium-tagged ruthenium complex immobilized on silica acts as a highly active and reusable olefin-metathesis pre-catalyst. This supported catalyst demonstrates excellent performance in batch and continuous-flow reactions with minimal ruthenium contamination.
Area of Science:
- Catalysis
- Materials Science
- Organic Chemistry
Background:
- Olefin metathesis is a crucial reaction in organic synthesis.
- Development of robust and reusable catalysts is essential for sustainable chemistry.
- Supported catalysts offer advantages in separation and recycling.
Purpose of the Study:
- To design and synthesize a novel pyridinium-tagged ruthenium (Ru) complex as a supported olefin-metathesis pre-catalyst.
- To evaluate the catalytic activity and reusability of the supported pre-catalyst under batch and continuous-flow conditions.
- To investigate the control over reactivity using an oxazine-benzylidene ligand.
Main Methods:
- Design and synthesis of a pyridinium-tagged Ru complex featuring an oxazine-benzylidene ligand.
- Immobilization of the Ru complex onto sulfonated silica and silica-based cationic-exchange resin.
- Evaluation of catalytic performance in ring-closing metathesis (RCM), cross metathesis (CM), and enyne metathesis.
- Assessment of catalyst reusability and ruthenium contamination levels.
Main Results:
- The synthesized Ru complex, when anchored onto sulfonated silica, formed a robust and highly active supported pre-catalyst.
- Excellent catalytic activities were observed in RCM, CM, and enyne metathesis with low pre-catalyst loading (0.5 mol%).
- Immobilization onto a cationic-exchange resin yielded a versatile material for batch and flow reactors, reusable with high purity and low Ru contamination (<5 ppm).
Conclusions:
- A highly active and reusable supported olefin-metathesis pre-catalyst was successfully developed.
- The catalyst system demonstrates efficient performance in both batch and continuous-flow processes.
- The developed material offers a sustainable approach to olefin metathesis with minimal metal leaching.
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