Results 91 to 100 of about 17,231 (260)
A general enantioselective route to the chamigrene natural product family [PDF]
, 2010 Described in this report is an enantioselective route toward the chamigrene natural product family. The key disconnections in our synthetic approach include sequential enantioselective decarboxylative allylation and ring-closing olefin metathesis to form
Grubbs, Robert H. +4 more
core +2 more sources
Beilstein Journal of Organic Chemistry, 2015 We have developed a simple methodology to transform cis-syn-cis-triquinane derivative 2 into the diindole based macrocycle 6 involving Fischer indolization and ring-closing metathesis (RCM).
Sambasivarao Kotha +2 more
doaj +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
Beilstein Journal of Organic Chemistry, 2015 Iodide-containing nitro-Grela-type catalysts have been synthesized and applied to ring closing metathesis (RCM) and cross metathesis (CM) reactions. These new catalysts have exhibited improved efficiency in the transformation of sterically, non-demanding
Andrzej Tracz +3 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
Molecules, 2010 The synthesis of a monosilylated Grubbs-Hoveyda ruthenium alkylidene complex is described, as well as the preparation and characterization of the corresponding material by sol-gel cogelification with tetraethoxysilane (TEOS) and the assay of this ...
Michel Wong Chi Man +4 more
doaj +1 more source
Microwave-assisted RCM for the synthesis of carbocyclic peptides [PDF]
, 2015 Microwave irradiation dramatically improves the efficiency of ring closing metathesis (RCM) reactions of resin-attached peptides and the technology is illustrated by the highly selective synthesis of dicarba analogues of α-conotoxin IMI.
Elaridi, Jomana +4 more
core +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
Synthesis of a Molecular Charm Bracelet via Click Cyclization and Olefin Metathesis Clipping [PDF]
, 2010 We describe the synthesis of a polycatenated cyclic polymer, a structure that resembles a molecular charm bracelet. Ruthenium-catalyzed ring-opening metathesis polymerization of an aminocontaining cyclic olefin monomer in the presence of a chain ...
Chan, Wing Yan +4 more
core +2 more sources
Tandem aza-Claisen rearrangement and ring closing metathesis reactions: the stereoselective synthesis of functionalised carbocyclic amides [PDF]
, 2009 A one-pot, tandem process has been developed for the efficient synthesis of functionalised carbocyclic amides. A substituted cyclopentenyl trichloroacetamide was synthesised using a tandem thermal aza-Claisen rearrangement and RCM process, while an ...
Donaldson, A. +2 more
core +1 more source