Highly Active Phosphine-Free Carbene Ruthenium Catalyst for Cross-Metathesis of Acrylonitrile with Functionalized Olefins.

ChemInform ◽  
2006 ◽  
Vol 37 (3) ◽  
Author(s):  
Chen-Xi Bai ◽  
Wen-Zhen Zhang ◽  
Ren He ◽  
Xiao-Bing Lu ◽  
Zhi-Qiang Zhang
Keyword(s):  
Ruthenium Catalyst ◽  
Cross Metathesis ◽  
Highly Active

Highly Active Cross-Metathesis of Tetrafluoroethylene with a Seven-Membered N-Heterocyclic-Carbene–Ruthenium Catalyst

2021 ◽  
Author(s):  
Kenta Mori ◽  
Midori Akiyama ◽  
Ko Inada ◽  
Yutaka Imamura ◽  
Yuichiro Ishibashi ◽  
...  
Keyword(s):  
Ruthenium Catalyst ◽  
Cross Metathesis ◽  
Highly Active

Highly active phosphine-free carbene ruthenium catalyst for cross-metathesis of acrylonitrile with functionalized olefins

2005 ◽  
Vol 46 (42) ◽  
pp. 7225-7228 ◽  
Author(s):  
Chen-Xi Bai ◽  
Wen-Zhen Zhang ◽  
Ren He ◽  
Xiao-Bing Lu ◽  
Zhi-Qiang Zhang
Keyword(s):  
Ruthenium Catalyst ◽  
Cross Metathesis ◽  
Highly Active

scholarly journals An artificial metalloenzyme biosensor can detect ethylene gas in fruits and Arabidopsis leaves

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Kenward Vong ◽  
Shohei Eda ◽  
Yasuhiro Kadota ◽  
Igor Nasibullin ◽  
Takanori Wakatake ◽  
...  
Keyword(s):  
Real Time ◽  
Chemical Space ◽  
Ethylene Biosynthesis ◽  
Ruthenium Catalyst ◽  
Design And Development ◽  
Cross Metathesis ◽  
Rapid Changes ◽  
Artificial Metalloenzymes ◽  
Induced Changes ◽  
Artificial Metalloenzyme

AbstractEnzyme biosensors are useful tools that can monitor rapid changes in metabolite levels in real-time. However, current approaches are largely constrained to metabolites within a limited chemical space. With the rising development of artificial metalloenzymes (ArM), a unique opportunity exists to design biosensors from the ground-up for metabolites that are difficult to detect using current technologies. Here we present the design and development of the ArM ethylene probe (AEP), where an albumin scaffold is used to solubilize and protect a quenched ruthenium catalyst. In the presence of the phytohormone ethylene, cross metathesis can occur to produce fluorescence. The probe can be used to detect both exogenous- and endogenous-induced changes to ethylene biosynthesis in fruits and leaves. Overall, this work represents an example of an ArM biosensor, designed specifically for the spatial and temporal detection of a biological metabolite previously not accessible using enzyme biosensors.

ChemInform Abstract: Highly Active Ruthenium Catalyst for Double Bond Migration.

ChemInform ◽  
2010 ◽  
Vol 27 (38) ◽  
pp. no-no
Author(s):  
S. KROMPIEC ◽  
J. SUWINSKI ◽  
J. GROBELNY
Keyword(s):  
Double Bond ◽  
Ruthenium Catalyst ◽  
Double Bond Migration ◽  
Highly Active

Efficient aqueous hydrogenation of levulinic acid to γ-valerolactone over a highly active and stable ruthenium catalyst

2016 ◽  
Vol 6 (5) ◽  
pp. 1469-1475 ◽  
Author(s):  
Jingjing Tan ◽  
Jinglei Cui ◽  
Guoqiang Ding ◽  
Tiansheng Deng ◽  
Yulei Zhu ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Ruthenium Catalyst ◽  
Highly Active

Efficient aqueous hydrogenation of levulinic acid to γ-valerolactone over a highly active and stable immobilized ruthenium catalyst with a GVL yield of 99.1 mol% at 25 °C.

scholarly journals MoO3 on zeolites MCM-22, MCM-56 and 2D-MFI as catalysts for 1-octene metathesis

2018 ◽  
Vol 14 ◽  
pp. 2931-2939 ◽  
Author(s):  
Hynek Balcar ◽  
Martin Kubů ◽  
Naděžda Žilková ◽  
Mariya Shamzhy
Keyword(s):  
Catalyst Activity ◽  
The Other ◽  
Moderate Activity ◽  
Two Dimensional ◽  
Enhancing Effect ◽  
Double Bond Isomerization ◽  
Cross Metathesis ◽  
Highly Active ◽  
Acid Catalyzed ◽  
Metathesis Catalysts

Highly active olefin metathesis catalysts were prepared by thermal spreading MoO3 and/or MoO2(acac)2 on MWW zeolites (MCM-22, delaminated MCM-56) and on two-dimensional MFI (all in NH4 + form). The catalysts‘ activities were tested in the metathesis of neat 1-octene (as an example of a longer chain olefin) at 40 °C. Catalysts with 6 wt % or 5 wt % of Mo were used. The acidic character of the supports had an important effect on both the catalyst activity and selectivity. The catalyst activity increases in the order 6MoO3/HZSM-5(25) (Si/Al = 25) << 6MoO2(acac)2/MCM-22(70) < 6MoO3/2D-MFI(26) < 6MoO3/MCM-56(13) < 6MoO3/MCM-22(28) reflecting both the enhancing effect of the supports‘ acidity and accessibility of the catalytic species on the surface. On the other hand the supports‘ acidity decreases the selectivity to the main metathesis product C14 due to an acid-catalyzed double bond isomerization (followed by cross metathesis) and oligomerization. 6MoO3/2D-MFI(26) with a lower concentration of the acidic centres resulting in catalysts of moderate activity but with the highest selectivity.

scholarly journals Efficient catalytic alkyne metathesis with a fluoroalkoxy-supported ditungsten(III) complex

2018 ◽  
Vol 14 ◽  
pp. 2425-2434 ◽  
Author(s):  
Henrike Ehrhorn ◽  
Janin Schlösser ◽  
Dirk Bockfeld ◽  
Matthias Tamm
Keyword(s):  
Metal Complexes ◽  
The Self ◽  
Significant Activity ◽  
Terminal Alkynes ◽  
Alkyne Metathesis ◽  
Cross Metathesis ◽  
Tungsten Complexes ◽  
Highly Active ◽  
Metathesis Catalysts ◽  
And Tungsten

The molybdenum and tungsten complexes M2(OR)6 (Mo2F6, M = Mo, R = C(CF3)2Me; W2F3, M = W, R = OC(CF3)Me2) were synthesized as bimetallic congeners of the highly active alkyne metathesis catalysts [MesC≡M{OC(CF3) n Me3− n }] (MoF6, M = Mo, n = 2; WF3, M = W, n = 1; Mes = 2,4,6-trimethylphenyl). The corresponding benzylidyne complex [PhC≡W{OC(CF3)Me2}] (W Ph F3) was prepared by cleaving the W≡W bond in W2F3 with 1-phenyl-1-propyne. The catalytic alkyne metathesis activity of these metal complexes was determined in the self-metathesis, ring-closing alkyne metathesis and cross-metathesis of internal and terminal alkynes, revealing an almost equally high metathesis activity for the bimetallic tungsten complex W2F3 and the alkylidyne complex W Ph F3. In contrast, Mo2F6 displayed no significant activity in alkyne metathesis.

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