scholarly journals Halide exchanged Hoveyda-type complexes in olefin metathesis

2010 ◽  
Vol 6 ◽  
pp. 1091-1098 ◽  
Author(s):  
Julia Wappel ◽  
César A Urbina-Blanco ◽  
Mudassar Abbas ◽  
Jörg H Albering ◽  
Robert Saf ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Catalytic Performance ◽  
Ring Closing Metathesis ◽  
Cross Metathesis ◽  
Metathesis Reactions ◽  
Metathesis Catalysts

The aims of this contribution are to present a straightforward synthesis of 2nd generation Hoveyda-type olefin metathesis catalysts bearing bromo and iodo ligands, and to disclose the subtle influence of the different anionic co-ligands on the catalytic performance of the complexes in ring opening metathesis polymerisation, ring closing metathesis, enyne cycloisomerisation and cross metathesis reactions.

scholarly journals Olefin metathesis in nano-sized systems

2011 ◽  
Vol 7 ◽  
pp. 94-103 ◽  
Author(s):  
Didier Astruc ◽  
Abdou K Diallo ◽  
Sylvain Gatard ◽  
Liyuan Liang ◽  
Cátia Ornelas ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Covalent Attachment ◽  
Enyne Metathesis ◽  
Ring Closing Metathesis ◽  
Cross Metathesis ◽  
Metathesis Reactions ◽  
Nano Catalysts

The interplay between olefin metathesis and dendrimers and other nano systems is addressed in this mini review mostly based on the authors’ own contributions over the last decade. Two subjects are presented and discussed: (i) The catalysis of olefin metathesis by dendritic nano-catalysts via either covalent attachment (ROMP) or, more usefully, dendrimer encapsulation – ring closing metathesis (RCM), cross metathesis (CM), enyne metathesis reactions (EYM) – for reactions in water without a co-solvent and (ii) construction and functionalization of dendrimers by CM reactions.

scholarly journals Light-induced olefin metathesis

2010 ◽  
Vol 6 ◽  
pp. 1106-1119 ◽  
Author(s):  
Yuval Vidavsky ◽  
N Gabriel Lemcoff
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Relevant Literature ◽  
Desirable Property ◽  
Light Activation ◽  
Light Olefin ◽  
Cross Metathesis ◽  
Metathesis Reactions ◽  
Catalytic Processes ◽  
The Many

Light activation is a most desirable property for catalysis control. Among the many catalytic processes that may be activated by light, olefin metathesis stands out as both academically motivating and practically useful. Starting from early tungsten heterogeneous photoinitiated metathesis, up to modern ruthenium methods based on complex photoisomerisation or indirect photoactivation, this survey of the relevant literature summarises past and present developments in the use of light to expedite olefin ring-closing, ring-opening polymerisation and cross-metathesis reactions.

Synthesis and characterization of non-chelating ruthenium–indenylidene olefin metathesis catalysts derived from substituted 1,1-diphenyl-2-propyn-1-ols

2015 ◽  
Vol 39 (3) ◽  
pp. 1858-1867 ◽  
Author(s):  
Baoyi Yu ◽  
Yu Xie ◽  
Fatma B. Hamad ◽  
Karen Leus ◽  
Alex A. Lyapkov ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
First Generation ◽  
Catalytic Performance ◽  
Ruthenium Catalysts ◽  
Synthesis And Characterization ◽  
Metathesis Reactions ◽  
Metathesis Catalysts

The synthesis and characterization of four first-generation modified non-chelating indenylidene ruthenium catalysts is reported, as well as their catalytic performance in olefin metathesis reactions.

scholarly journals The catalytic performance of Ru–NHC alkylidene complexes: PCy3 versus pyridine as the dissociating ligand

2010 ◽  
Vol 6 ◽  
pp. 1188-1198 ◽  
Author(s):  
Stefan Krehl ◽  
Diana Geißler ◽  
Sylvia Hauke ◽  
Oliver Kunz ◽  
Lucia Staude ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Enyne Metathesis ◽  
Pyridine Ligand ◽  
Ring Closing Metathesis ◽  
Similar Activity ◽  
Cross Metathesis ◽  
Pyridine Complex ◽  
Metathesis Reactions ◽  
Alkylidene Complexes

The catalytic performance of NHC-ligated Ru-indenylidene or benzylidene complexes bearing a tricyclohexylphosphine or a pyridine ligand in ring closing metathesis (RCM), cross metathesis, and ring closing enyne metathesis (RCEYM) reactions is compared. While the PCy3 complexes perform significantly better in RCM and RCEYM reactions than the pyridine complex, all catalysts show similar activity in cross metathesis reactions.

A simple and practical preparation of an efficient water soluble olefin metathesis catalyst

2015 ◽  
Vol 17 (6) ◽  
pp. 3407-3414 ◽  
Author(s):  
Zhen J. Wang ◽  
W. Roy Jackson ◽  
Andrea J. Robinson
Keyword(s):  
Olefin Metathesis ◽  
Water Soluble ◽  
Ring Closing Metathesis ◽  
Cross Metathesis ◽  
Metathesis Catalyst ◽  
Metathesis Reactions ◽  
Scale Preparation

A facile gram-scale preparation of a di-ammonium functionalised Ru-alkylidene complex which efficiently catalyses ring-closing metathesis and cross-metathesis reactions in water.

scholarly journals Hoveyda–Grubbs catalysts with an N→Ru coordinate bond in a six-membered ring. Synthesis of stable, industrially scalable, highly efficient ruthenium metathesis catalysts and 2-vinylbenzylamine ligands as their precursors

2019 ◽  
Vol 15 ◽  
pp. 769-779 ◽  
Author(s):  
Kirill B Polyanskii ◽  
Kseniia A Alekseeva ◽  
Pavel V Raspertov ◽  
Pavel A Kumandin ◽  
Eugeniya V Nikitina ◽  
...  
Keyword(s):  
Ring Opening ◽  
The Novel ◽  
Ring Closing Metathesis ◽  
X Ray ◽  
X Ray Crystallography ◽  
Cross Metathesis ◽  
Grubbs Catalysts ◽  
Coordinate Bond ◽  
Metathesis Catalysts ◽  
Hofmann Cleavage

A novel and efficient approach to the synthesis of 2-vinylbenzylamines is reported. This involves obtaining 2-vinylbenzylamine ligands from tetrahydroisoquinoline by alkylation and reduction followed by the Hofmann cleavage. The resultant 2-vinylbenzylamines allowed us to obtain new Hoveyda–Grubbs catalysts, which were thoroughly characterised by NMR, ESIMS, and X-ray crystallography. The utility of this chemistry is further demonstrated by the tests of the novel catalysts (up to 10−2 mol %) in different metathesis reactions such as cross metathesis (CM), ring-closing metathesis (RCM) and ring-opening cross metathesis (ROCM).

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