Results 201 to 210 of about 17,231 (260)

Ring-Closing Metathesis

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

Enamide−Olefin Ring-Closing Metathesis

Organic Letters, 2001
[reaction: see text] The first examples of ring-closing metathesis reactions of olefin-containing enamides using ruthenium-based catalysts have been demonstrated. A preliminary investigation into the scope and limitations, leading to protected five- and six-membered cyclic enamides, will be presented.
Kinderman, S.S., van Maarseveen, J.H., Schoemaker, H.E., Hiemstra, H., Rutjes, F.P.J.T.   +4 more
openaire   +5 more sources

Heptane-Soluble Ring-Closing Metathesis Catalysts

Organic Letters, 2007
Terminally 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, Jianhua, Tian, Hassan S, Bazzi, David E, Bergbreiter   +3 more
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Group‐Selective Ring‐Closing Enyne Metathesis

ChemInform, 2005
AbstractChemInform 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.
Sarah V, Maifeld, Daesung, Lee
openaire   +2 more sources

Ring-Closing Metathesis in Carbohydrate Annulation

Angewandte Chemie International Edition, 1998
Even eight-membered rings (such as in 2) can be formed by ring-closing metathesis of glucose derivatives such as 1. Enantiomerically pure tricyclic spiro compounds can also be prepared.
Holt, DJ, Barker, WD, Jenkins, PR, Davies, DL, Garratt, S, Fawcett, J, Russell, DR, Ghosh, S   +7 more
openaire   +2 more sources

Ring-Closing Metathesis Approach to Dictyostatin

Organic Letters, 2005
[reaction: see text] An esterification/ring-closing metathesis approach to dictyostatin and discodermolide is introduced. The approach provides for facile fragment coupling of two main segments of these natural products at the C10-C11 alkene with high to complete Z-selectivity.
Cyrous O, Kangani, Arndt M, Brückner, Dennis P, Curran   +2 more
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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
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2.10 Ring-Closing Metathesis

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
openaire   +1 more source