Results 211 to 220 of about 17,231 (260)
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Solvents for ring-closing metathesis reactions
Chemical Communications, 2008A study of the influence of eight diverse solvents on a Grubbs II-catalysed ring-closing metathesis (RCM) reaction reveals a complex dependence of the different reaction steps on the solvent and suggests acetic acid as a useful solvent for RCM reactions.
Claire S, Adjiman +3 more
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Tandem dienyne cross-metathesis/ring-closing metathesis
Tetrahedron Letters, 2001Abstract Tandem enyne cross-metathesis/ring-closing metathesis between terminal alkynes and 1,5-hexadiene has been demonstrated using the 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene-substituted ruthenium benzylidene complex. Synthesis of 2-substituted 1,3-cyclohexadienes using this one step tandem reaction is reported.
Jason A Smulik, Steven T Diver
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Ring‐Closing Metathesis in Aqueous Micellar Medium
Chemistry – A European Journal, 2011Underwater exploration: The ring-closing metathesis of N,N-diallyltosylamine (DATs) and diallyldiethyl malonate has been studied in aqueous micellar medium, at room temperature, in the presence of four different gemini cationic surfactants and various ruthenium catalysts.
Laville, Lionel +4 more
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Myxovirescin analogues via macrocyclic ring–closing metathesis
Bioorganic & Medicinal Chemistry Letters, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
Stéphane, Content +2 more
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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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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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2009
All three catalysts are illustrated as “LnM=CHR” in the mechanism below.
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All three catalysts are illustrated as “LnM=CHR” in the mechanism below.
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ChemInform Abstract: Ring‐Closing Metathesis
ChemInform, 2011AbstractReview: 228 refs.
Nicole L. Snyder, Kevin W. Graepel
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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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Equilibrium Ring-Closing Metathesis
Chemical Reviews, 2009Sebastien, Monfette, Deryn E, Fogg
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