A simple and practical phase-separation approach to the recycling of a homogeneous metathesis catalyst
作者:Anna Michrowska、Łukasz Gułajski、Karol Grela
DOI:10.1039/b517088e
日期:——
The air stable asarone-derived Ru carbene 16, a robust olefin metathesis catalyst, can be easily separated after reaction by deposition on silica gel and reused up to nine times. This procedure provides products of excellent purity with low Ru content.
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
Theory-assisted development of a robust and Z-selective olefin metathesis catalyst
作者:Giovanni Occhipinti、Vitali Koudriavtsev、Karl W. Törnroos、Vidar R. Jensen
DOI:10.1039/c4dt00409d
日期:——
A tight interplay between theory and experiment has led to the development of a new, highly Z-selective ruthenium-based olefin metathesis catalyst that can be used in air, with unpurified and non-degassed substrates and solvents, and in the presence of acids.
Highly Active Ruthenium Metathesis Catalysts Exhibiting Unprecedented Activity and <i>Z</i>-Selectivity
作者:Lauren E. Rosebrugh、Myles B. Herbert、Vanessa M. Marx、Benjamin K. Keitz、Robert H. Grubbs
DOI:10.1021/ja311916m
日期:2013.1.30
A novel chelated ruthenium-based metathesiscatalyst bearing an N-2,6-diisopropylphenyl group is reported and displays near-perfect selectivity for the Z-olefin (>95%), as well as unparalleled TONs of up to 7400, in a variety of homodimerization and industrially relevant metathesis reactions. This derivative and other new catalytically active species were synthesized using an improved method employing
Ru-based Z-selective metathesis catalysts with modified cyclometalated carbene ligands
作者:Sarah M. Bronner、Myles B. Herbert、Paresma R. Patel、Vanessa M. Marx、Robert H. Grubbs
DOI:10.1039/c4sc01541j
日期:——
A series of cyclometalated Z-selective ruthenium olefin metathesis catalysts with alterations to the N-heterocyclic carbene (NHC) ligand were prepared.