New olefin metathesis catalyst bearing N-mesitylimidazole and nitrate ligands – Synthesis, activity, and performance in aqueous media
作者:Marta Malinowska、Mariana Kozlowska、Agnieszka Hryniewicka、Jacek W. Morzycki
DOI:10.1016/j.jorganchem.2019.06.018
日期:2019.9
activity in the model metathesis reactions. However, its activity increases upon the addition of an aqueous HCl 1 M solution. Activated Ru complex successfully promotes metathesis in organic solvents as well as in water, enabling efficient performance (even up to 100%) of the catalyst under environment-friendly conditions. The activation mechanism of the reported catalyst is supported by time-dependent
Large‐Scale Synthesis of a Niche Olefin Metathesis Catalyst Bearing an Unsymmetrical N‐Heterocyclic Carbene (NHC) Ligand and its Application in a Green Pharmaceutical Context
large‐scale synthesis of known Ru olefinmetathesis catalyst VII featuring an unsymmetrical N‐heterocyclic carbene (NHC) ligand with one 2,5‐diisopropylphenyl (DIPP) and one thiophenylmethylene N‐substituent is reported. The optimised procedure does not require column chromatography in any step and allows for preparation of up to 0.5 kg batches of the catalyst from simple precursors. The application profile
Ruthenium Olefin Metathesis Catalysts with N-Heterocyclic Carbene Ligands Bearing <i>N</i>-Naphthyl Side Chains
作者:Ludovic Vieille-Petit、Hervé Clavier、Anthony Linden、Sascha Blumentritt、Steven P. Nolan、Reto Dorta
DOI:10.1021/om9009697
日期:2010.2.22
second-generation ruthenium-based olefinmetathesis catalysts bearing N-naphthyl-substituted N-heterocyclic carbene (NHC) ligands have been prepared and fully characterized. By reaction with the appropriate NHC, these complexes are readily accessible in one synthesis step from the commercially available first-generation precursors [RuCl2(═CHPh)(PCy3)2] (Grubbs I, GI) or [RuCl2(═CH-o-iPrO-Ph)(PCy3)] (Hoveyda−Grubbs
The Influence of Phosphane Ligands on the Versatility of Ruthenium-Indenylidene Complexes in Metathesis
作者:Julie Broggi、César A. Urbina-Blanco、Hervé Clavier、Anita Leitgeb、Christian Slugovc、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1002/chem.201000659
日期:——
study dealing with the effect of phosphane fine‐tuning in ruthenium–indenylidene catalysts was performed. Challenged to establish how the electronic properties of para‐substituted phosphane ligands translate into catalyst activity, the versatile behaviour of these new ruthenium–indenylidenecomplexes was investigated for a number of metathesis reactions.
Ruthenium Complex Bearing a Hydroxy Group Functionalised N‐Heterocyclic Carbene Ligand – A Universal Platform for Synthesis of Tagged and Immobilised Catalysts for Olefin Metathesis
A ruthenium-based olefin metathesis catalysts featuring a hydroxy-substituted N-heterocyclic carbeneligand is described as a platform for the synthesis of functionalised catalysts through direct acylation of this common precursor. Such complexes have been immobilised on solid support and the corresponding heterogeneous catalysts exhibited a high stability and reactivity both in batch and in flow.