Monothiolate ruthenium alkylidene complexes with tricyclic fluorinated N-heterocyclic carbene ligands
作者:Timur R. Akmalov、Salekh M. Masoud、Daria V. Vorobyeva、Fedor M. Dolgushin、Sergey E. Nefedov、Sergey N. Osipov
DOI:10.1016/j.mencom.2019.01.011
日期:2019.1
New monothiolate ruthenium alkylidene complexes bearing bulky tricyclic N-heterocyclic carbene ligands decorated with two geminal trifluoromethyl groups were synthesized. Their catalytic activity in representative olefin metathesis reactions, such as ring closing metathesis of diallyltosylamine and selfmetathesis of allylbenzene, has been evaluated.
Simple and Highly <i>Z</i>-Selective Ruthenium-Based Olefin Metathesis Catalyst
作者:Giovanni Occhipinti、Fredrik R. Hansen、Karl W. Törnroos、Vidar R. Jensen
DOI:10.1021/ja311505v
日期:2013.3.6
second-generation catalyst with a 2,4,6-triphenylbenzenethiolate ligand resulted in an active olefinmetathesiscatalyst with remarkable Z selectivity, reaching 96% in metathesis homocoupling of terminal olefins. High turnover numbers (up to 2000 for homocoupling of 1-octene) were obtained along with sustained appreciable Z selectivity (>85%). Apart from the Z selectivity, many properties of the newcatalyst, such
Grubbs-Hoveyda 第二代催化剂的单个氯阴离子与 2,4,6-三苯基硫醇盐配体一步取代得到活性烯烃复分解催化剂,具有显着的 Z 选择性,末端烯烃复分解均偶联达到 96% . 获得了高周转数(对于 1-辛烯的同源偶联高达 2000)以及持续可观的 Z 选择性(> 85%)。除了 Z 选择性之外,新催化剂的许多性质,例如对氧气和水的稳定性以及使底物异构化和与内烯烃产物反应的趋势,都与母体催化剂的性质相似。
Olefin metathesis catalysts
申请人:Bergen Teknologioverforing AS
公开号:US08716488B2
公开(公告)日:2014-05-06
The present invention refers to novel ruthenium- and osmium-based catalysts for olefin metathesis reactions, particularly to catalysts having stereoselective properties. Z-selectivity is obtained by utilizing two mono-anionic ligands of very different steric requirement. In olefin metathesis reactions these catalysts selectively provide the Z-isomer of disubstituted olefinic products.
[EN] IMPROVED OLEFIN METATHESIS CATALYSTS<br/>[FR] CATALYSEURS DE MÉTATHÈSE D'OLÉFINES AMÉLIORÉS
申请人:BERGEN TEKNOLOGIOVERFØRING AS
公开号:WO2017009232A1
公开(公告)日:2017-01-19
The present invention refers to novel ruthenium-based catalysts for olefin metathesis reactions, particularly to fast initiating catalysts having stereoselective properties. In olefin metathesis reactions, the disclosed catalysts provide a high catalytic activity combined with the capability to generate higher yields of the olefin metathesis product.
The present invention refers to novel ruthenium- and osmium-based catalysts for olefin metathesis reactions, particularly to catalysts having stereoselective properties. Z-selectivity is obtained by utilising two mono-anionic ligands of very different steric requirement. In olefin metathesis reactions these catalysts selectively provide the Z-isomer of disubstituted olefinic products even in presence of air or of acids.