38511-09-0Relevant articles and documents
Highly controllable poly(N-vinylimidazole)-supported ruthenium catalysts for olefin metathesis reactions in aqueous media
?ztürk, Bengi ?zgün,Sariaslan, Begüm,Bayramgil, Nursel Pekel,?ehito?lu, Solmaz Karabulut
, p. 19 - 24 (2014)
In this study, we reported a novel poly(N-vinylimidazole) (PVI)-supported latent ruthenium catalyst for olefin metathesis applications in aqueous media. The catalysts were synthesized using direct immobilization of first- and second-generation Grubbs catalysts on poly(N-vinylimidazole). The immobilized catalysts were characterized using FT-IR, SEM and EDX. The catalysts are metathesis inactive in both organic and aqueous media but can be activated via the introduction of acid to the reaction medium. The activity of the catalysts was tested on ring closing metathesis (RCM) and ring opening metathesis polymerization (ROMP) reactions. It was shown that the molecular weight of the ROMP polymers can be controlled by initiating the reaction with varying HCl/Ru ratios. Additionally, the reusability of the catalysts for RCM of diethyldiallylmalonate was studied. In addition, the RCM reaction of diethyldiallylmalonate can be switched on and off via the introduction of acids and bases to the reaction media using PVI-supported ruthenium catalysts.
Olefin-metathesis reactions using vinylideneruthenium(II) complexes as catalyst precursors
Katayama, Hiroyuki,Urushima, Hideto,Ozawa, Fumiyuki
, p. 16 - 25 (2000)
Vinylideneruthenium(II) complexes of the type RuCl2(=C=CHR)L2 (R = But, ferrocenyl; L = PPri3, PCy3), which are easily accessible from [RuCl2(p-cymene)]2 and terminal
Synthesis and characterization of ruthenium(II) complexes with dendritic N-heterocyclic carbene ligands Metallodendrimers Special Issue
Fujihara, Tetsuaki,Nishida, Takeru,Terao, Jun,Tsuji, Yasushi
, p. 174 - 178 (2014)
Ru(II) complexes with a N-heterocyclic carbene ligand bearing flexible zeroth-, first-, or second-generation dendritic moieties were synthesized and characterized. The structure of the ruthenium complex with the zeroth-generation dendritic moieties was determined by X-ray crystallography. ONIOM calculations showed that the second generation dendritic moieties surrounded the ruthenium core. These complexes worked as active catalysts for the ring-closing metathesis at 25 °C.
In a Quest for Selectivity Paired with Activity: A Ruthenium Olefin Metathesis Catalyst Bearing an Unsymmetrical Phenanthrene-Based N-Heterocyclic Carbene
D?browski, Micha?,Grela, Karol,Trzybiński, Damian,Wo?niak, Krzysztof,Wyr?bek, Przemys?aw
supporting information, (2020/03/19)
Robust, selective, and stable in the presence of ethylene, ruthenium olefin metathesis pre-catalyst, {[3-benzyl-1-(10-phenyl-9-phenanthryl)]-2-imidazolidinylidene}dichloro(o-isopropoxyphenylmethylene)ruthenium(II), Ru-3, bearing an unsymetrical N-heterocyclic carbene (uNHC) ligand, has been synthesized. The initiation rate of Ru-3 was examined by ring-closing metathesis and cross-metathesis reactions with a broad spectrum of olefins, showing an unprecendented selectivity. It was also tested in industrially relevant ethenolysis reactions of olefinic substrates from renewable feedstock with very good yields and selectivities.
Semiheterogeneous Purification Protocol for the Removal of Ruthenium Impurities from Olefin Metathesis Reaction Products Using an Isocyanide Scavenger
Szczepaniak, Grzegorz,Noga?, Wojciech,Piatkowski, Jakub,Ruszczyńska, Anna,Bulska, Ewa,Grela, Karol
supporting information, p. 836 - 844 (2019/04/17)
A low-waste, time-economical, and scalable semiheterogeneous purification protocol for the removal of ruthenium residues from olefin metathesis (OM) reactions has been developed. It is based on the non-covalent immobilization of the commercially available
