scholarly journals Synthesis of Alkyne Metathesis Catalysts from Tris(dimethylamido)tungsten Precursors

2020 ◽  
Vol 2020 (47) ◽  
pp. 4454-4464
Author(s):  
Daniel Melcher ◽  
Òscar Àrias ◽  
Matthias Freytag ◽  
Peter G. Jones ◽  
Matthias Tamm
Keyword(s):  
Alkyne Metathesis ◽  
Metathesis Catalysts

scholarly journals Impact of Ligands and Metals on the Formation of Metallacyclic Intermediates and a Nontraditional Mechanism for Group VI Alkyne Metathesis Catalysts

2021 ◽  
Author(s):  
Richard R. Thompson ◽  
Madeline E. Rotella ◽  
Xin Zhou ◽  
Frank R. Fronczek ◽  
Osvaldo Gutierrez ◽  
...  
Keyword(s):  
Alkyne Metathesis ◽  
Group Vi ◽  
Metathesis Catalysts

scholarly journals Recent advances in the development of alkyne metathesis catalysts

2011 ◽  
Vol 7 ◽  
pp. 82-93 ◽  
Author(s):  
Xian Wu ◽  
Matthias Tamm
Keyword(s):  
Alkyne Metathesis ◽  
Highly Active ◽  
Recent Advances ◽  
Metathesis Reactions ◽  
Metathesis Catalysts ◽  
And Tungsten

The number of well-defined molybdenum and tungsten alkylidyne complexes that are able to catalyze alkyne metathesis reactions efficiently has been significantly expanded in recent years.The latest developments in this field featuring highly active imidazolin-2-iminato- and silanolate–alkylidyne complexes are outlined in this review.

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.

ChemInform Abstract: Multidentate Triphenolsilane-Based Alkyne Metathesis Catalysts.

ChemInform ◽  
2013 ◽  
Vol 44 (32) ◽  
pp. no-no
Author(s):  
Haishen Yang ◽  
Zhenning Liu ◽  
Wei Zhang
Keyword(s):  
Alkyne Metathesis ◽  
Metathesis Catalysts
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