Results 11 to 20 of about 17,231 (260)
Regioselective Synthesis of Spiro-Oxindoles via a Ruthenium-Catalyzed Metathesis Reaction
Chemistry Proceedings, 2023 Spiro-oxindoles are important heterocyclic motifs found in various alkaloids, many of which exhibit pharmacological properties. Due to the remarkable biological activity of spiro-oxindoles, significant effort has been made towards the synthesis of ...
Pradip Debnath
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Enantioselective Synthesis of 5-epi-Citreoviral Using Ruthenium-Catalyzed Asymmetric Ring-Closing Metathesis [PDF]
, 2009 Chiral ruthenium olefin metathesis catalysts can perform asymmetric ring-closing reactions in ≥90% ee with low catalyst loadings. To illustrate the practicality of these reactions and the products they form, an enantioselective total synthesis of 5-epi ...
Funk, Timothy W.
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Formation of bridged bicycloalkenes via ring closing metathesis [PDF]
, 1998 Ring closing metathesis may be used in the formation of small ring bicycloalkenes from monocyclic diene ...
Grubbs, Robert H., Morehead, Andrew, Jr.
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Ruthenium Olefin Metathesis Catalysts Bearing Carbohydrate-Based N-Heterocyclic Carbenes [PDF]
, 2010 Ru-based olefin metathesis catalysts containing carbohydrate-derived NHCs from glucose and galactose were synthesized and characterized by NMR spectroscopy. 2D-NMR spectroscopy revealed the presence of Ru−C (benzylidene) rotamers at room temperature, and
Grubbs, Robert H., Keitz, Benjamin K.
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Facile Synthesis of Effcient and Selective Ruthenium Olefin Metathesis Catalysts with Sulfonate and Phosphate Ligands [PDF]
, 2010 A series of novel, air-stable ruthenium NHC catalysts with sulfonate and phosphate anions have been prepared easily in one pot at high yields using commercially available precursors.
Grubbs, Robert H., Teo, Peili
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Molecules, 2005 Sesqui- and sesterterpenes of ophiobolin and fusicoccin families are important synthetic targets because of complexity of structure and potentially useful physiological activities, including anti-tumor activity.
J. Wicha, M. Michalak, K. Michalak
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Beilstein Journal of Organic Chemistry, 2010 The catalytic performance of NHC-ligated Ru-indenylidene or benzylidene complexes bearing a tricyclohexylphosphine or a pyridine ligand in ring closing metathesis (RCM), cross metathesis, and ring closing enyne metathesis (RCEYM) reactions is compared ...
Stefan Krehl +5 more
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Ruthenium Olefin Metathesis Catalysts Bearing an N-Fluorophenyl-N-Mesityl-Substituted Unsymmetrical N-Heterocyclic Carbene [PDF]
, 2007 Two new ruthenium-based olefin metathesis catalysts, each bearing an unsymmetrical N-heterocyclic carbene ligand, have been synthesized and fully characterized.
Grubbs, Robert H. +1 more
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Synthesis of fluorinated δ-lactams via cycloisomerization of gem-difluoropropargyl amides
Beilstein Journal of Organic Chemistry, 2010 gem-Difluoro-1,7-enyne amides are suitable building blocks for the synthesis of difluorodihydropyridinones via a ring-closing metathesis reaction, and of 4,4-difluoro-3-oxoisoquinolines through a ring-closing metathesis–enyne metathesis tandem reaction ...
Satoru Arimitsu, Gerald B. Hammond
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Química Nova, 2005 The olefin metathesis reaction allows the exchange of complex alkyl units between two olefins, with the formation of a new olefinic link and a sub-product olefin usually ethylene.
Daniel Frederico +2 more
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