Results 41 to 50 of about 20,349 (227)
Ruthenium-based olefin metathesis catalysts with monodentate unsymmetrical NHC ligands
Beilstein Journal of Organic Chemistry, 2018 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
Veronica Paradiso +2 more
doaj +1 more source
Low Catalyst Loadings in Olefin Metathesis: Synthesis of Nitrogen Heterocycles by Ring-Closing Metathesis [PDF]
, 2010 A series of ruthenium catalysts have been screened under ring-closing metathesis (RCM) conditions to produce five-, six-, and seven-membered carbamate-protected cyclic amines. Many of these catalysts demonstrated excellent RCM activity and yields with as
Champagne, Timothy M. +8 more
core +2 more sources
Halide exchanged Hoveyda-type complexes in olefin metathesis
Beilstein Journal of Organic Chemistry, 2010 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 ...
Julia Wappel +6 more
doaj +1 more source
International Journal of Technology, 2017 Oleic acid, one of the major components of palm oil, has attracted much interest in modern oleochemistry. The internal olefin group in oleic acid is a useful functional group in the transformation of a fatty acid to other functional chemicals and ...
Robby Roswanda +2 more
doaj +1 more source
Photolithographic Olefin Metathesis Polymerization
Journal of the American Chemical Society, 2013 Patterning functional materials is a central challenge across many fields of science. The ability to lithographically fabricate micro- and nanostructures has been one of the most impactful technological breakthroughs of the last century. In part due to the complexity of the chemical processes in photoresists, there is a limited variety of materials ...
Weitekamp, Raymond A. +2 more
openaire +3 more sources
Ring-Expansion Metathesis Polymerization: Catalyst-Dependent Polymerization Profiles [PDF]
, 2009 Ring-expansion metathesis polymerization (REMP) mediated by recently developed cyclic Ru catalysts has been studied in detail with a focus on the polymer products obtained under varied reaction conditions and catalyst architectures.
Boydston, Andrew J. +6 more
core +2 more sources
Well-defined silica-supported olefin metathesis catalysts [PDF]
, 2009 Two triethoxysilyl-functionalized N-heterocyclic carbene ligands have been synthesized and used to prepare the corresponding second-generation ruthenium olefin metathesis catalysts.
Allen, Daryl P. +2 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2007 BackgroundTandem olefin metathesis sequences are known to be versatile for the generation of natural product scaffolds and have also been used for ring opening of strained carbo- and heterocycles.
Wolfgang Maison +2 more
doaj +1 more source
Cascade metathesis reactions for the synthesis of taxane and isotaxane derivatives [PDF]
, 2016 Tricyclic isotaxane and taxane derivatives and have been synthesized by a very efficient cascade ring-closing dienyne metathesis (RCDEYM) reaction, which formed the A and B rings in one operation.
Aouzal, Remi +7 more
core +3 more sources
Chemistry – A European Journal, EarlyView.ABSTRACT Over the past twenty years, main group chemistry has significantly expanded its scope to include reactivities once considered the exclusive domain of transition metals. Among the emerging concepts, element‐ligand cooperation has proven to be a powerful strategy for enabling bond activation reactions but remains relatively unexplored for ...
Lennart Hensle, Viktoria H. Gessner
wiley +1 more source