Results 181 to 190 of about 4,073,255 (239)
Advanced Synthesis & Catalysis, 2007 AbstractThe application of olefin cross‐metathesis to vinyl‐functionalized thiazoles and the tandem Stille coupling/cross‐metathesis of bis‐trifloylthiazoles are reported. These processes offer new opportunities for the synthesis of complex natural products.
Jyotirmayee Dash +2 more
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, 2018 Abstract During the past two decades, among all the types of transition-metal-catalyzed reaction, olefin metathesis has become arguably the most powerful synthetic tool for carbon–carbon bond formation. The reason for this is undoubtedly the development of well-defined functional-group-tolerant N-heterocyclic carbene (NHC) based ruthenium alkylidene ...
A. Jana, P. Malecki, K. Grela
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Recent Developments in Olefin Cross-Metathesis
Angewandte Chemie - International Edition, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
Stephen J Connon, Siegfried Blechert
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Cross‐Metathesis of Terminal Alkynes
Chemistry – A European Journal, 2014Abstract Terminal acetylenes are amongst the most problematic substrates for alkyne metathesis because they tend to undergo rapid polymerization on contact with a metal alkylidyne. The molybdenum complex 3 endowed with triphenylsilanolate ligands, however, is capable of ...
Lhermet, R., Fürstner, A.
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Two-directional cross-metathesis
Organic & Biomolecular Chemistry, 2009Two-directional cross-metathesis of a range of alpha,omega dienes with a variety of electron deficient alkenes has been accomplished. It was found that the process is quite general and gives complete selectivity for the E,E-dienes, making this a very useful and high yielding protocol for two-directional chain elongation.
Annabella F, Newton +8 more
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Alkenol−Alkyne Cross Metathesis
Organic Letters, 2008Allyl alcohols and their homologues were used in the enyne cross metathesis to prepare hydroxy-functionalized dienes. An isomerization was found to occur under prolonged heating, and a method for conversion to ( E)-diene product is also reported.
Daniel A, Clark +2 more
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2007
Olefin cross-metathesis has become an indispensable tool for efficient carbon–carbon bond formation. Fundamental studies on functional group tolerance and an understanding of the steric and electronic factors crucial to product selectivity have led to the development of an empirical model for reaction design.
Grubbs, R. H. +2 more
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Olefin cross-metathesis has become an indispensable tool for efficient carbon–carbon bond formation. Fundamental studies on functional group tolerance and an understanding of the steric and electronic factors crucial to product selectivity have led to the development of an empirical model for reaction design.
Grubbs, R. H. +2 more
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Olefin cross-metathesis with vinyl halides
Chemical Communications, 2008The first successful example of olefin cross-metathesis with chloroalkenes is reported.
Volodymyr, Sashuk +3 more
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Chemical & Engineering News Archive, 2007
OLEFIN CROSS-METATHESIS , the coupling of two distinct alkenes, is a useful synthetic organic reaction, but it has only rarely been achieved on solid phase. Researchers have now found that proper spacing between the polymer support and the tethered alkene makes the solid-phase reaction more feasible.
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OLEFIN CROSS-METATHESIS , the coupling of two distinct alkenes, is a useful synthetic organic reaction, but it has only rarely been achieved on solid phase. Researchers have now found that proper spacing between the polymer support and the tethered alkene makes the solid-phase reaction more feasible.
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Catalytic Nitrile-Alkyne Cross-Metathesis
Journal of the American Chemical Society, 2007The first catalytic cross-metathesis reaction of an alkyne with a nitrile is described. The nitride complex N⋮W(OC(CF3)2CH3)3(DME) undergoes reversible triple-bond metathesis reactions with alkynes (RC⋮CR; R = Et, 4-C6H4OMe), forming the alkylidyne complexes RC⋮W(OC(CF3)2CH3)3(DME) (R = Et, 4-C6H4OMe) along with the corresponding nitrile RC⋮N. This has
Andrea M, Geyer +3 more
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