Stable ruthenium olefin metathesis catalysts bearing symmetrical NHC ligands with primary and secondary N-alkyl groups

2018 ◽  
Vol 47 (18) ◽  
pp. 6615-6627 ◽  
Author(s):  
Chiara Ambrosio ◽  
Veronica Paradiso ◽  
Chiara Costabile ◽  
Valerio Bertolasi ◽  
Tonino Caruso ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Ruthenium Complexes ◽  
Alkyl Groups ◽  
Metathesis Reactions ◽  
Metathesis Catalysts

Novel ruthenium complexes with N,N′-dialkyl-substituted NHCs and their application in metathesis reactions involving model and biorenewable compounds are presented.

scholarly journals Ruthenium-based olefin metathesis catalysts with monodentate unsymmetrical NHC ligands

2018 ◽  
Vol 14 ◽  
pp. 3122-3149 ◽  
Author(s):  
Veronica Paradiso ◽  
Chiara Costabile ◽  
Fabia Grisi
Keyword(s):  
Olefin Metathesis ◽  
Catalytic Properties ◽  
Ruthenium Complexes ◽  
Current State ◽  
State Of Research ◽  
Metathesis Catalysts

An overview on the catalytic properties of ruthenium complexes for olefin metathesis bearing monodentate unsymmetrical N-heterocyclic diaminocarbene ligands is provided. The non-symmetric nature of these NHC architectures strongly influences activity and selectivity of the resulting catalysts. The main achievements that have been accomplished in significant areas of olefin metathesis up to the current state of research are discussed.

scholarly journals Metathesis access to monocyclic iminocyclitol-based therapeutic agents

2011 ◽  
Vol 7 ◽  
pp. 699-716 ◽  
Author(s):  
Ileana Dragutan ◽  
Valerian Dragutan ◽  
Carmen Mitan ◽  
Hermanus CM Vosloo ◽  
Lionel Delaude ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Metabolic Disorders ◽  
Therapeutic Agents ◽  
Comparative Performance ◽  
Common Diseases ◽  
Metathesis Reactions ◽  
Recent Developments ◽  
Metathesis Catalysts ◽  
Steric Control

By focusing on recent developments on natural and non-natural azasugars (iminocyclitols), this review bolsters the case for the role of olefin metathesis reactions (RCM, CM) as key transformations in the multistep syntheses of pyrrolidine-, piperidine- and azepane-based iminocyclitols, as important therapeutic agents against a range of common diseases and as tools for studying metabolic disorders. Considerable improvements brought about by introduction of one or more metathesis steps are outlined, with emphasis on the exquisite steric control and atom-economical outcome of the overall process. The comparative performance of several established metathesis catalysts is also highlighted.

Mixed N-heterocyclic carbene/phosphite ruthenium complexes: towards a new generation of olefin metathesis catalysts

2010 ◽  
Vol 46 (38) ◽  
pp. 7115 ◽  
Author(s):  
Xavier Bantreil ◽  
Thibault E. Schmid ◽  
Rebecca A. M. Randall ◽  
Alexandra M. Z. Slawin ◽  
Catherine S. J. Cazin
Keyword(s):  
Olefin Metathesis ◽  
Ruthenium Complexes ◽  
Metathesis Catalysts ◽  
New Generation

scholarly journals Non covalent immobilization of pyrene-tagged ruthenium complexes onto graphene surfaces for recycling in olefin metathesis reactions

2016 ◽  
Vol 425 ◽  
pp. 136-146 ◽  
Author(s):  
Houssein Nasrallah ◽  
Stéphane Germain ◽  
Pierre Queval ◽  
Caroline Bouvier ◽  
Marc Mauduit ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Ruthenium Complexes ◽  
Covalent Immobilization ◽  
Metathesis Reactions

scholarly journals Ruthenium indenylidene “1st generation” olefin metathesis catalysts containing triisopropyl phosphite

2015 ◽  
Vol 11 ◽  
pp. 1520-1527 ◽  
Author(s):  
Stefano Guidone ◽  
Fady Nahra ◽  
Alexandra M Z Slawin ◽  
Catherine S J Cazin
Keyword(s):  
Experimental Data ◽  
Thermal Stability ◽  
Olefin Metathesis ◽  
Synergistic Effects ◽  
Metathesis Reactions ◽  
Metathesis Catalysts ◽  
Ru Species

The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords “1st generation” cis-complexes. These have been used in olefin metathesis reactions. The cis-Ru species exhibit noticeable differences with the trans-Ru parent complexes in terms of structure, thermal stability and reactivity. Experimental data underline the importance of synergistic effects between phosphites and L-type ligands.

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.

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