Results 211 to 220 of about 4,566,251 (289)

Efficient Z-Selective Olefin-Acrylamide Cross-Metathesis Enabled by Sterically Demanding Cyclometalated Ruthenium Catalysts.

Journal of the American Chemical Society, 2020
The efficient Z-selective cross-metathesis between acrylamides and common terminal olefins has been developed by the use of novel cyclometalated ruthenium catalysts with bulky N-heterocyclic carbene (NHC) ligands.
Yan Xu, Jonathan J. Wong, Adrian E. Samkian, J. Ko, Shuming Chen, K. Houk, R. Grubbs   +6 more
semanticscholar   +1 more source

Two-directional cross-metathesis

Organic & Biomolecular Chemistry, 2009
Two-directional cross-metathesis of a range of alpha,omega dienes with a variety of electron deficient alkenes has been accomplished. It was found that the process is quite general and gives complete selectivity for the E,E-dienes, making this a very useful and high yielding protocol for two-directional chain elongation.
Annabella F, Newton, Stephen J, Roe, Jean-Christophe, Legeay, Pooja, Aggarwal, Camille, Gignoux, Nicola J, Birch, Robert, Nixon, Marie-Lyne, Alcaraz, Robert A, Stockman   +8 more
openaire   +2 more sources

Alkenol−Alkyne Cross Metathesis

Organic Letters, 2008
Allyl alcohols and their homologues were used in the enyne cross metathesis to prepare hydroxy-functionalized dienes. An isomerization was found to occur under prolonged heating, and a method for conversion to ( E)-diene product is also reported.
Daniel A, Clark, Joseph R, Clark, Steven T, Diver   +2 more
openaire   +2 more sources

Cross‐Metathesis of Terminal Alkynes

Chemistry – A European Journal, 2014
AbstractTerminal acetylenes are amongst the most problematic substrates for alkyne metathesis because they tend to undergo rapid polymerization on contact with a metal alkylidyne. The molybdenum complex 3 endowed with triphenylsilanolate ligands, however, is capable of inducing surprisingly effective cross‐metathesis reactions of terminal alkyl ...
Lhermet, R., Fürstner, A.
openaire   +3 more sources

Alkane Cross-Metathesis Reaction between Light and Heavy Linear Alkanes, on a Silica Supported Well-Defined Single-Site Catalyst

ACS Catalysis, 2019
Alkane cross-metathesis of light and heavy paraffins is a compelling way to upgrade two low cost streams into more valuable products, in only one step and using a single catalyst.
N. Morlanés, Santosh Kavitake, Devon C. Rosenfeld, J. Basset   +3 more
semanticscholar   +1 more source

Synthesis of Unsaturated Esters by Cross-Metathesis of Terpenes and Natural Rubber Using Ru-Alkylidene Catalysts

Current organic chemistry, 2019
This study reports the cross-metathesis of bicyclic β-pinene, acyclic cis-3- methylpent-2-ene terpenes and the natural rubber with functionalized olefins, a route for the functionalization of the carbon-carbon double bond of natural products to obtain ...
Araceli Martínez, M. Tlenkopatchev, Selena Gutiérrez, Manuel Burelo, J. Vargas, E. Jiménez‐Regalado   +5 more
semanticscholar   +1 more source

Fluoro-imidazopyridinylidene Ruthenium Catalysts for Cross Metathesis with Ethylene

Organometallics, 2019
A series of ruthenium metathesis catalysts bearing fluorinated imidazo[1,5-a]pyridin-3-ylidene carbenes (F-ImPy) were developed for ethenolysis (cross metathesis with ethylene) of methyl oleate.
Seunghwan Byun, Huiyeong Seo, Jun-Ho Choi, J. Ryu, Junseong Lee, Won‐jin Chung, Sukwon Hong   +6 more
semanticscholar   +1 more source

Carbonyl-Olefin Cross-Metathesis Through a Visible-Light-Induced 1,3-Diol Formation and Fragmentation Sequence.

Angewandte Chemie, 2018
A visible-light-mediated approach to carbonyl-olefin cross-metathesis is described. Photoinduced hole catalysis was used to promote the formation of 1,3-diols from aldehydes and styrenes, which were then readily fragmented under acidic conditions to form
Lena Pitzer, Frederik Sandfort, Felix Strieth-Kalthoff, F. Glorius   +3 more
semanticscholar   +1 more source

Catalytic Nitrile-Alkyne Cross-Metathesis

Journal of the American Chemical Society, 2007
The first catalytic cross-metathesis reaction of an alkyne with a nitrile is described. The nitride complex N⋮W(OC(CF3)2CH3)3(DME) undergoes reversible triple-bond metathesis reactions with alkynes (RC⋮CR; R = Et, 4-C6H4OMe), forming the alkylidyne complexes RC⋮W(OC(CF3)2CH3)3(DME) (R = Et, 4-C6H4OMe) along with the corresponding nitrile RC⋮N. This has
Andrea M, Geyer, Robyn L, Gdula, Eric S, Wiedner, Marc J A, Johnson   +3 more
openaire   +2 more sources

Hybrid Polymerization of Ring-Opening Metathesis and Cross-Metathesis for Polyolefins with Tunable Architectures

Macromolecules, 2018
A ring-opening metathesis–cross-metathesis (ROM-CM) hybrid polymerization strategy was developed for the synthesis of polyolefins with different topologies.
Ning Ren, Xinyuan Zhu
semanticscholar   +1 more source