Results 81 to 90 of about 17,341 (257)
Beilstein Journal of Organic Chemistry, 2015 Two ruthenium olefin metathesis initiators featuring electronically modified quinoline-based chelating carbene ligands are introduced. Their reactivity in RCM and ROMP reactions was tested and the results were compared to those obtained with the parent ...
Karolina Żukowska +5 more
doaj +1 more source
Olefin Metathesis Reaction in Water and in Air Improved by Supramolecular Additives
Molecules, 2015 A range of water-immiscible commercially available Grubbs-type precatalysts can be used in ring-closing olefin metathesis reaction in high yields. The synthetic transformation is possible in pure water under ambient conditions.
Jasmine Tomasek +3 more
doaj +1 more source
Effects of NHC-Backbone Substitution on Efficiency in Ruthenium-Based Olefin Metathesis [PDF]
, 2009 series of ruthenium olefin metathesis catalysts bearing N-heterocyclic carbene (NHC) ligands with varying degrees of backbone and N-aryl substitution have been prepared.
Bourg, Jean-Baptiste +4 more
core +2 more sources
Ruthenium-Based Heterocyclic Carbene-Coordinated Olefin Metathesis Catalysts [PDF]
, 2010 The fascinating story of olefin (or alkene) metathesis (eq 1) began almost five decades ago, when Anderson and Merckling reported the first carbon-carbon double-bond rearrangement reaction in the titanium-catalyzed polymerization of norbornene.
Grubbs, Robert H. +1 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2013 A variety of highly functionalized indole-based [n.3.3]propellane derivatives is described. The synthesis of the propellane derivatives involves a Weiss–Cook condensation, a Fischer indole cyclization, and a ring-closing metathesis as key steps.
Sambasivarao Kotha +2 more
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2020 A fast, protecting-group-free synthesis of dihydropyridinones has been developed. Starting from commercially available aldehydes, a novel one-pot amidoallylation gave access to diene compounds in good yields.
Thomas J. Cogswell +2 more
doaj +1 more source
Cycloheptenyne dicobalt hexacarbonyl complexes by ring closing metathesis [PDF]
, 2001 Hexacarbonyldicobalt complexes of cycloheptenynes (4) may be prepared by the ring closing metathesis of the corresponding acyclic dienes (2) using Grubbs\u27 catalyst, (Cy3P)(2)Cl2Ru=CHPh.
Green, James R.
core +2 more sources
A short stereoselective synthesis of (+)-(6R,2′S)-cryptocaryalactone via ring-closing metathesis
Beilstein Journal of Organic Chemistry, 2009 A short stereoselective synthesis of (+)-(6R,2′S)-cryptocaryalactone was successfully completed. Key steps included the application of Carreira’s asymmetric alkynylation reaction to form a propargylic alcohol and subsequently lactone formation using the ...
Palakodety Radha Krishna +2 more
doaj +1 more source
One-pot multi-reaction processes: synthesis of natural products and drug-like scaffolds [PDF]
, 2014 One-pot multi-reaction processes involving Overman rearrangements, metathesis cyclizations, and Diels–Alder reactions have been developed for the rapid and efficient synthesis of amino-substituted carbocyclic and heterocyclic compounds.
Calder, Ewen D.D. +2 more
core +1 more source
Conformational analysis of olefin-carbene ruthenium metathesis catalysts [PDF]
, 2009 We settle a long-standing disagreement of DFT with experiment (both solution and gas phase) for the phosphine dissociation process in Grubbs metathesis catalysis. Our findings with the M06 functional provide further support to gas-phase experimental work,
Benitez, Diego +2 more
core +1 more source