Results 51 to 60 of about 10,092 (232)

Synthesis of Pentacycloundecane (PCUD) Based Spiro-Pyrano-Cage Framework via Ring-Closing Metathesis

Molbank, 2023
Here, we demonstrate a short synthetic route to pyrano cage systems containing pentacycloundecane units by employing ring-closing metathesis (RCM) as a key step.
Sambasivarao Kotha, Mohammad Salman, Subba Rao Cheekatla   +2 more
doaj   +1 more source

Ring opening metathesis polymerisation of phenylnorbornene dicarboxyimide derivatives [PDF]

, 2003
The work described in this thesis illustrates that a series of exo-phenyl norbomene dicarboxyimide derivatives are synthesised and characterised using several spectroscopic methods.
Mzanywa, Neeba Lucky
core  

Unlocking Catalyst Activation as a Critical Bottleneck in Cross‐Coupling Reactions: Room‐Temperature Couplings of Weak Nucleophiles Enabled by [Pd(1‐MeNAP)TFA]2 Precatalysts

Angewandte Chemie International Edition, EarlyView.
In many Pd‐catalyzed cross‐couplings, catalyst performance has been found to be limited by catalyst activation. Methylnaphthyl (MeNAP) palladium trifluoroacetate dimers are presented as easy‐to‐store and easy‐to‐handle precursors, which rapidly activate under reaction conditions, even when only weakly coordinating, non‐reducing nucleophiles are present.
Sourav Manna, Henric F. Janning, Nikolaos V. Tzouras, Jane Anto Simplica Sagayaraj, Fadil Faizal Mannighayil, Angelino Doppiu, Lukas J. Gooßen   +6 more
wiley   +1 more source

Synthesis of block copolymers by the conversion of living anionic polymerisation into living ROMP [PDF]

, 2004
A methodology for the synthesis of well-defined block copolymers from living anionic polymerisation and ring opening metathesis polymerisation (ROMP) using well-defined ruthenium alkylidene initiators has been developed.
Castle, Thomas Charles
core  

Application of olefin metathesis in the synthesis of functionalized polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials

Beilstein Journal of Organic Chemistry, 2019
This mini-review summarizes the applications of olefin metathesis in synthesis and functionalization of polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials.
Patrycja Żak, Cezary Pietraszuk
doaj   +1 more source

The synthesis of some new polymeric materials as potential additives for diesel fuel [PDF]

, 1993
Wax crystal formation in diesel and related hydrocarbon fuels during cold weather is a long standing problem. Current polymeric additives to diesel fuel modify the crystal habit of the wax, in a variety of ways, to improve its performance at low ...
Smith, Carole-Anne
core  

‐Enantioselective Olefin Metathesis

, 2023
International audienceAsymmetric Olefin Metathesis (AOM) represents a highly versatile synthetic tool to lead relevant chiral building blocks with excellent enantiopurity.
Jakub Talcik, Morvan, Jennifer, Dylan Bouëtard, Bouëtard, Dylan, Mauduit, Marc, Antonio Del Vecchio, Talcik, Jakub, Jennifer Morvan, del Vecchio, Antonio, Marc Mauduit   +9 more
core   +1 more source

The intriguing modeling of cis–trans selectivity in ruthenium-catalyzed olefin metathesis

Beilstein Journal of Organic Chemistry, 2011
In this study we have investigated computationally the origin of the cis–trans selectivity in the Ru-catalyzed cross metathesis (CM) of a prototype monosubstituted olefin, i.e., propene.
Naeimeh Bahri-Laleh, Raffaele Credendino, Luigi Cavallo   +2 more
doaj   +1 more source

Catalytic Carbonyl-Olefin Metathesis of Aliphatic Ketones: Iron(III) HomoDimers as Lewis Acidic Superelectrophiles

, 2018
Catalytic carbonyl-olefin metathesis reactions have recently been developed as a powerful tool for carbon-carbon bondformation. However, currently available synthetic protocols rely exclusively on aryl ketone substrates while the corresponding aliphatic ...
Paul M., Zimmerman, Haley, Albright, Jolene P., Reid, Christopher C., McAtee, Lindsey A., Karp, Matthew S., Sigman, Corinna S., Schindler, Jacob R., Ludwig, Paul S., Riehl   +8 more
core   +1 more source

Inadequacy of Continuum Solvation for Polar Reactions: Predicting the Mechanism of Carbonyl–Olefin Metathesis

, 2022
In carbonyl–olefin metathesis, two π-bonds undergo a cycloaddition-cycloreversion process to form valuable alkenes from simple precursors. Although this synthetic methodology has advanced significantly, further improvements would be greatly facilitated ...
Eugene, Kwan, Corin, Wagen, Corinna, Schindler, Hannah, Vonesh, Joshua, Thedford, Spencer, McMinn   +5 more
core   +1 more source