Results 171 to 180 of about 3,168 (214)
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Synthesis of Spirocyclic Butenolides by Ring Closing Metathesis.
ChemInform, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
Peter Langer, Uwe Albrecht
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Synthesis of Cyclic Peptides by Ring-Closing Metathesis
The Journal of Organic Chemistry, 2000The synthesis of a series of "amide to amide" cyclized peptides by ring-closing metathesis (RCM) as well as a convenient synthesis for the linear precursors is described. In addition, the influence of the length of the alkene substituents and the influence of the peptide sequence is investigated, leading to a set of general rules to obtain "amide to ...
Reichwein, J.F. +2 more
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Ring-closing metathesis in peptides
Tetrahedron Letters, 2016Abstract This review highlights developments in the field of ring-closing metathesis applied to the synthesis of cyclic peptides. Special attention is focussed on the synthesis of dicarba peptides that mimic native cystine containing peptides. Recent advances in the field are discussed, including the stereoselective synthesis of carbon-bridged ...
Ellen C. Gleeson +2 more
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Synthesis of the mycolactone core by ring-closing metathesis
Chemical Communications, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Matthew D, Alexander +5 more
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Macrocycles by Ring-Closing Metathesis
Synthesis, 1997The ruthenium carbene complexes 1 and 2 (0.05-5 mol%) catalyse highly efficient macrocyclization reactions of 1,ω-dienes by ring-closing metathesis (RCM). Key parameters for successful RCM are (i) the presence of a functional group which serves as a relay entity that assembles the reacting sites, (ii) an appropriate distance between this polar group ...
Fürstner, A., Langemann, K.
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Ruthenium Promoted On-DNA Ring-Closing Metathesis and Cross-Metathesis
Bioconjugate Chemistry, 2017DNA-encoded library technology (ELT) is now widely used in pharmaceutical, biotechnological, and academic research for hit identification and target validation. New on-DNA reactions are keys to exploring greater chemical space and accessing challenging chemotypes such as configurationally constrained macrocycles.
Xiaojie Lu +4 more
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Molybdenum-Catalyzed Ring-Closing Metathesis of Allenynes
Organic Letters, 2005A ring-closing metathesis reaction of allenynes occurred at room temperature in the presence of a molybdenum alkylidene complex to give ring-closed vinylallenes. The vinylallene skeletons were constructed by a metathesis-type reaction between the alkyne moiety and the proximal carbon-carbon double bond of the allene moiety. [reaction: see text]
Murakami, M, Kadowaki, S, Matsuda, T
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Heptane-Soluble Ring-Closing Metathesis Catalysts
Organic Letters, 2007Terminally vinyl-functionalized polyisobutylene (PIB) oligomers can be easily transformed into end-functionalized PIB-bound Ru metathesis catalysts. The nonpolar catalysts so prepared can be used as solutions in heptane and recycled by a gravity-based extraction after addition of a heptane-immiscible polar solvent.
Chayanant, Hongfa +3 more
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2016
AbstractRing-closing metathesis (RCM) has emerged as a powerful synthetic tool. Depending on the unsaturated functional groups involved, ring-closing-metathesis reactions are classified into three categories: diene ring-closing metathesis, enyne ring-closing metathesis, and diyne ring-closing metathesis.
D. Lee, V. R. Sabbasani
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AbstractRing-closing metathesis (RCM) has emerged as a powerful synthetic tool. Depending on the unsaturated functional groups involved, ring-closing-metathesis reactions are classified into three categories: diene ring-closing metathesis, enyne ring-closing metathesis, and diyne ring-closing metathesis.
D. Lee, V. R. Sabbasani
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2018
AbstractThis chapter describes the use of ruthenium alkylidene complexes bearing N-heterocyclic carbene ligands as catalysts for the preparation of cyclic compounds (from 5- to 33-membered rings) by metathesis. Also included are examples of asymmetric metathesis using catalysts bearing chiral N-heterocyclic carbenes.
J. Broggi, H. Clavier
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AbstractThis chapter describes the use of ruthenium alkylidene complexes bearing N-heterocyclic carbene ligands as catalysts for the preparation of cyclic compounds (from 5- to 33-membered rings) by metathesis. Also included are examples of asymmetric metathesis using catalysts bearing chiral N-heterocyclic carbenes.
J. Broggi, H. Clavier
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