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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
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Catalytic cyclization and competitive deactivation with Ru(PR2NR'2) complexes.
J M Stubbs1, J-P J Bow1, R J Hazlehurst1
1Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada. johanna.blacquiere@uwo.ca.
Dalton Transactions (Cambridge, England : 2003)
|November 2, 2016
Summary
The P2N2 ligand family shows promise in organic synthesis, enabling ruthenium-catalyzed cyclization reactions. However, catalyst efficiency is currently limited by low conversion and deactivation issues.
Area of Science:
- Organometallic Chemistry
- Catalysis
- Organic Synthesis
Background:
- The development of novel ligand families is crucial for advancing catalytic organic synthesis.
- Ruthenium complexes are versatile catalysts for various organic transformations.
Purpose of the Study:
- To report the first application of the P2N2 (1,5-diaza-3,7-diphosphacyclooctane) ligand family in organic synthesis.
- To investigate the catalytic activity of ruthenium precatalysts bearing P2N2 ligands for cyclization reactions.
Main Methods:
- Synthesis and characterization of ruthenium precatalysts featuring P2N2 ligands.
- Evaluation of catalytic activity in the cyclization of 2-ethynylbenzyl alcohol.
- Analysis of catalyst performance, including conversion and deactivation pathways.
Main Results:
- The P2N2 ligand family was successfully employed in ruthenium-catalyzed organic synthesis.
- [Ru(Cp)(P2N2)(MeCN)]PF6 precatalysts demonstrated activity in the cyclization of 2-ethynylbenzyl alcohol.
- Catalytic reactions proceeded at low catalyst loading and mild temperatures.
Conclusions:
- Ruthenium complexes with P2N2 ligands represent a new class of catalysts for organic synthesis.
- While active, catalyst performance is hindered by low conversion and competitive deactivation.
- Further optimization of the P2N2 ligand system is warranted to overcome limitations.
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