Results 51 to 60 of about 938,190 (242)

Metátese de olefinas aplicada ao fechamento de anéis: uma ferramenta poderosa para a síntese de macrociclos naturais Ring-closing olefin metathesis: a powerful tool for the synthesis of natural macrocycles

Química Nova, 2008
For a quarter of a century, metathesis has become indispensable for the synthesis of natural and non-natural products, particularly of biologically active compounds.
Anderson Rouge dos Santos, Carlos Roland Kaiser, Jean-Pierre Férézou   +2 more
doaj   +1 more source

Multiple Olefin Metathesis Polymerization That Combines All Three Olefin Metathesis Transformations: Ring-Opening, Ring-Closing, and Cross Metathesis

, 2016
We demonstrated tandem ring-opening/ring-closing metathesis (RO/RCM) polymerization of monomers containing two cyclopentene moieties and postmodification via insertion polymerization.
Tae-Lim Choi (1500892), Ho-Keun Lee (1666681), Andreas Hess (284397), Ki-Taek Bang (1666684), Robert H. Grubbs (1666687)   +4 more
core   +1 more source

Functionalisable cyclopolymers by ring-closing metathesis [PDF]

, 2020
Post‐polymerisation modification of polymers is extremely beneficial in terms of designing brand new synthetic pathways toward functional complex polymers.
Alkattan, Mohammed
core   +1 more source

Bidirectional Disulfide Metathesis Enables Recycling of High‐Performance Thermoset Networks

Advanced Science, EarlyView.
A cyclic aromatic disulfide comonomer enables dual‐mode recyclable pDCPD thermosets through bidirectional disulfide metathesis. The resulting networks combine enhanced mechanical performance with thermal reprocessability and chemical depolymerization into reusable oligomeric fragments, allowing regeneration of high‐performance thermosets with minimal ...
Bohan Li, Jie Zheng, Daniel Paniroi Situmorang, Jia‐xin Neo, Hongzhi Feng, Jinling Li, Loh Xian‐Jun, Zibiao Li, Teck‐Peng Loh   +8 more
wiley   +1 more source

NHC‐Copper(I)‐Mediated Functionalization of White Phosphorus

Angewandte Chemie, EarlyView.
White phosphorus is functionalized by N‐heterocyclic carbene supported copper(I) complexes through redox‐neutral steps. Treatment of the resulting complexes with electrophiles releases the ligands from the metal center as asymmetrically substituted organophosphorus butterfly compounds.
Thomas M. Horsley Downie, Sophia A. Vogler, Gábor Balázs, Francesco Cirigliano, Robert Wolf   +4 more
wiley   +2 more sources

Profluorescent substrates for the screening of olefin metathesis catalysts

Beilstein Journal of Organic Chemistry, 2015
Herein we report on a 96-well plate assay based on the fluorescence resulting from the ring-closing metathesis of two profluorophoric substrates. To demonstrate the validity of the approach, four commercially available ruthenium-metathesis catalysts were
Raphael Reuter, Thomas R. Ward
doaj   +1 more source

Stereoselective Synthesis of Euscapholide and Tetraketide via Prins Cyclisation and Ring-Closing Metathesis

SynOpen, 2022
A concise and diastereoselective total synthesis of tetraketide and euscapholide is described in ten steps in 10.6% overall yield from acetaldehyde and (S)-pent-4-ene-1,2-diol.
Dhanraj O. Biradar, Yogesh D. Mane, Basi V. Subba Reddy   +2 more
doaj   +1 more source

Ring Closing Metathesis Reaction

, 1999
Various spiro cyclic systems are prepared from β-di-carbonyl compounds and active methylene substrates via palladium catalyzed allylation and ring-closing metathesis (RCM) reaction as key ...
Ashoke Deb, Ethirajan Manivannan, Ganesh, Thota, Nampally Sreenivasachary, Sreenivasachary, Nampally, Thota Ganesh, Kotha, Sambasivarao, Sambasivarao Kotha, Manivannan, Ethirajan, Deb, Ashoke   +9 more
core   +1 more source

Probing Electrocatalyst Design for Product Selectivity in CO2 Reduction

Advanced Science, EarlyView.
Selective CO2 electroreduction is controlled by catalyst structure, dynamic surface reconstruction, adsorbate interactions, and reaction microenvironment. This review summarizes Cu‐ and non‐Cu‐based catalysts, single‐atom and molecular systems, degradation pathways, and operando/computational strategies for steering CO2RR toward hydrocarbons ...
Suvodeep Sen, Bapan Biswas, Apinya Ngoipala, Julia Wiktor, Ujjwal Pal, Shalini Singh   +5 more
wiley   +1 more source

Latent ruthenium–indenylidene catalysts bearing a N-heterocyclic carbene and a bidentate picolinate ligand

Beilstein Journal of Organic Chemistry, 2015
A silver-free methodology was developed for the synthesis of unprecedented N-heterocyclic carbene ruthenium indenylidene complexes bearing a bidentate picolinate ligand.
Thibault E. Schmid, Florian Modicom, Adrien Dumas, Etienne Borré, Loic Toupet, Olivier Baslé, Marc Mauduit   +6 more
doaj   +1 more source