406911-89-5Relevant academic research and scientific papers
Synthesis and catalytic activity of a Grubbs-Hoveyda pre-catalyst having a trimeric resting state
Liu, Guiyan,Wu, Bin,Wang, Jianhui
, p. 441 - 445 (2015/04/22)
A Grubbs-Hoveyda pre-catalyst having a trimeric resting state based on 2,4,6-trichloro-1,3,5-triazine was synthesized and the complex was characterized by NMR, HRMS and elemental analysis. The activity of this complex for ring-closing metathesis (RCM) was
Synthesis and catalytic study of ruthenium carbene catalyst containing a Zn-porphyrin ligand
Xu, Ying,Zhang, Huizhu,Wang, Xinyuan,Liu, Guiyan
, p. 1393 - 1397 (2016/02/18)
A ruthenium carbene complex containing a Zn-porphyrin ligand has been developed. The complex was characterized by 1H NMR, IR, HRMS and elemental analysis. The catalytic activity of the ruthenium carbene complex for olefin metathesis reactions w
Efficient ruthenium metathesis catalysts containing carborane ligands
Liu, Guiyan,Zhang, Huizhu,Zhao, Xia,Wang, Jianhui
, p. 13 - 17 (2013/10/22)
A first generation Hoveyda-Grubbs ruthenium complex with a closo-1,2-C 2B10H11 tag has been prepared. This new catalyst was tested in ring-closing metathesis (RCM) reactions and proved to be quite efficient. In addition, t
FT Raman - A valuable tool for surveying kinetics in RCM of functionalized dienes
Ding, Fu,Yu, Baoyi,Monsaert, Stijn,Sun, Ya-Guang,Gao, Enjun,Dragutan, Ileana,Dragutan, Valerian,Verpoort, Francis
scheme or table, p. 170 - 174 (2010/09/06)
In this article the suitability of FT Raman spectroscopy for monitoring kinetics of ring-closing metathesis promoted by the Grubbs' 1st generation precatalyst was demonstrated for the first time. Reactions at room temperature and under low catalyst loadings were carried out on a series of representative diene substrates. The time evolution of the characteristic Raman stretching vibrations unequivocally described the reaction progress allowing for precise calculation of the substrate conversion and of the yield in the expected cyclic product, based on the corresponding peak heights. The responsive Raman technique demonstrated clean RCM pathways for diethyl diallylmalonate and diallyl ether whereas a minor olefinic side-product was detected in the case of diallyl phthalate. The study provides essential underpinnings for future utilization of Raman spectroscopy, concurrently with NMR or supplementing it, for the evaluation of RCM reactions.
Recycling a homogeneous catalyst through a light-controlled phase tag
Liu, Guiyan,Wang, Jianhui
supporting information; experimental part, p. 4425 - 4429 (2010/08/07)
(Figure Presented) A homogeneous ruthenium-carbene complex was tagged with a lightresponding nitrobenzospiropyran group to control its solubility through reversible conversion between its neutral (lipophilic) and ionic (lipophobic) states using light irradiation (see scheme; Mes = mesityl). This tagged complex has significant catalytic activity in ring-closing metathesis reactions and was recycled several times.
Ferrocene redox controlled reversible immobilization of ruthenium carbene in ionic liquid: A versatile catalyst for ring-closing metathesis
Liu, Guiyan,He, Haiyan,Wang, Jianhui
experimental part, p. 1610 - 1620 (2011/02/25)
A ferrocene-tagged ruthenium carbene 15 that can be reversibly immobilized in an ionic liquid (IL) via the controlled oxidation and reduction of a ferrocene tag was prepared. This offers a new strategy which uses redox chemistry to control immobilization and to recycle both the catalyst and the IL. In this experiment, 11 recycles were performed for the ring-closing metathesis (RCM) of a substrate using 16 as the catalyst in an ionic liquid (IL). More importantly, after the reaction was completed, the ruthenium catalyst was easily separated from the supporting IL by just adding decamethylferrocene (DMFc) to reduce the cationic ferrocene and then extracting it with benzene. Thus, this recycle system offers an easy way to recycle both the ruthenium catalyst and the IL.
RUTHENIUM COMPOUNDS, THEIR PRODUCTION AND USE
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Page/Page column 35; 37; 38, (2008/06/13)
A new class of compounds is disclosed that in preferred embodiments relate to Ru-based catalysts suitable for use in olefin metathesis reactions. Such compounds demonstrate high rates of catalytic turnover in comparison with other Ru catalysts known in the art. Moreover, the catalysts are highly stable, and readily suited to attachment to a solid support via the anionic ligands. In preferred embodiments the compounds present significant advantages by permitting facile isolation of active catalyst. The invention also pertains to methods of producing the catalysts, and their use in catalyzing olefin metathesis reactions.
