Results 191 to 200 of about 938,190 (242)

Equilibrium Ring-Closing Metathesis

Chemical Reviews, 2009
Deryn E Fogg, Sébastien Monfette
exaly   +3 more sources

Ring-Closing Metathesis

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
R. Poli, K. M. Smith
  +5 more sources

Asymmetric Ring‐Closing Metathesis with a Twist

Angewandte Chemie International Edition, 2009
AbstractA double flip! The catalyst shown, with a molybdenum stereocenter and monodentate ligands (Si=SitBuMe2), promotes asymmetric ring‐closing metathesis of a broad range of substrates. Its unprecedented activity originates from its structural fluxionality, which enables double inversion at the metal center in the course of a single catalytic cycle.
Hendrik F T, Klare, Martin, Oestreich
openaire   +2 more sources

A Ring-Closing Metathesis Strategy to Phosphonosugars

Organic Letters, 2001
[reaction: see text]. Syntheses of cyclic phosphonate (phostone) analogues of carbohydrates containing a phosphorus atom at the anomeric position are described. The ring-closing metathesis reaction of mixed allylic phenyl esters of allylphosphonic acid 2 and 22 generates the six-membered allylic phosphonates 3 and 23 in excellent yields.
D S, Stoianova, P R, Hanson
openaire   +2 more sources

Oligomers as Intermediates in Ring-Closing Metathesis

Journal of the American Chemical Society, 2007
Oligomerization is kinetically favored in RCM reactions catalyzed by RuCl2(PCy3)(IMes)(CHPh), for a range of unhindered α,ω-dienes leading to large or medium-sized rings, even at dilutions designed to minimize intermolecular reaction. Reversible metathesis (i.e., ethenolysis) is inhibited by rapid volatilization of ethylene.
Jay C, Conrad, Melanie D, Eelman, João A Duarte, Silva, Sebastien, Monfette, Henrietta H, Parnas, Jennifer L, Snelgrove, Deryn E, Fogg   +6 more
openaire   +2 more sources

Ring closing metathesis of unprotected peptides

Chemical Communications, 2017
Brønsted acid masking of unprotected peptide sequences facilitates high yielding Ru-alkylidene catalysed RCM to cyclic dicarba peptidomimetics in solution.
Ellen C. Gleeson, W. Roy Jackson, Andrea J. Robinson   +2 more
openaire   +2 more sources

Synthesis of Sultones by Ring Closing Metathesis

Synlett, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Sandra Karsch, Pia Schwab, Peter Metz
openaire   +1 more source

Central Core of Uprolides D and E: A Survey of Some Ring Closing Metathesis Approaches

Tetrahedron Letters, 2007
A preliminary study dealing with the feasibility of ring closing metathesis and ene-yne ring closing metathesis to construct the central bicyclic cores of uprolides D and E was ...
Mukund K Gurjar, C V Ramana
exaly   +2 more sources

Ring‐Closing Metathesis in Aqueous Micellar Medium

Chemistry – A European Journal, 2011
Underwater 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, Charnay, Clarence, Lamaty, Frédéric, Martinez, Jean, Colacino, Evelina   +4 more
openaire   +2 more sources

Synthesis of Cyclic Peptides by Ring-Closing Metathesis

The Journal of Organic Chemistry, 2000
The 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., Versluis, C., Liskamp, R.M.J.   +2 more
openaire   +3 more sources