Results 201 to 210 of about 26,308 (247)

Ruthenium Promoted On-DNA Ring-Closing Metathesis and Cross-Metathesis

Bioconjugate Chemistry, 2017
DNA-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, Lijun Fan, Christopher B. Phelps, Christopher P. Davie, Christine P. Donahue   +4 more
openaire   +2 more sources

ChemInform Abstract: Cross‐Metathesis

ChemInform, 1999
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Susan E. Gibson, Stephen P. Keen
openaire   +1 more source

Olefin cross-metathesis with vinyl halides

Chemical Communications, 2008
The first successful example of olefin cross-metathesis with chloroalkenes is reported.
Volodymyr, Sashuk, Cezary, Samojłowicz, Anna, Szadkowska, Karol, Grela   +3 more
openaire   +2 more sources

Two-directional ring-opening cross-metathesis

Chemical Communications, 2009
Two-directional ring-opening cross-metathesis of a range of cyclic alkenes 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 synthesis.
Stephen J, Roe, Jean-Christophe, Legeay, Diane, Robbins, Pooja, Aggarwal, Robert A, Stockman   +4 more
openaire   +2 more sources

Butadiene from acetylene–ethylene cross-metathesis

Chemical Communications, 2015
Direct synthesis of butadiene from acetylene and ethylene, via enyne cross-metathesis, is demonstrated with commercial ruthenium carbene catalysts.
Trotus, I., Zimmermann, T., Duyckaerts, N., Geboers, J., Schüth, F.   +4 more
openaire   +3 more sources

Hexafunctionalized Borromeates Using Olefin Cross Metathesis

Organic Letters, 2007
Employing well-established template-directed protocols, which depend upon dynamic covalent, coordinative, and noncovalent chemistry for their efficient outputs, we have synthesized, in a convergent manner, Borromeates composed of three identical macrocycles which present, diagonally in pairs, six exo-bidentate bipyridyl ligands and six endo ...
Claire R, Yates, Diego, Benítez, Saeed I, Khan, J Fraser, Stoddart   +3 more
openaire   +2 more sources

Cross-Metathesis Assisted by Microwave Irradiation

The Journal of Organic Chemistry, 2005
Microwave irradiation effectively accelerates cross-coupling metathesis reactions between deactivated olefins. Reactions have been carried out with the phosphine-free Hoveyda-Grubbs catalyst and the "second generation Grubbs' catalyst." While there have been reports that a "microwave effect" is observed in various transformations, the accelerations we ...
Frédéric C, Bargiggia, William V, Murray   +1 more
openaire   +2 more sources

Cross Metathesis Route in Sphingomyelin Synthesis

Chemistry Letters, 2004
Abstract Cross metathesis reaction of short chain Boc sphingosine using Grubbs’ 2nd generation catalyst proceeded in stereoselective manner to afford Boc sphingosine in good yield. An efficient synthesis of sphingomyelin was achieved from the obtained Boc sphingosine using our own phosphorylation reagent.
Hiroko Hasegawa, Tetsuya Yamamoto, Sho Hatano, Toshikazu Hakogi, Shigeo Katsumura   +4 more
openaire   +1 more source

Synthesis of Vinyl‐Functionalized Thiazoles by Cross‐Metathesis and Tandem Stille Coupling/Cross‐Metathesis

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, Stellios Arseniyadis, Janine Cossy   +2 more
openaire   +1 more source

Ring closing metathesis and cross metathesis of carbohydrate derivatives

Tetrahedron Letters, 1998
Abstract In connection with the synthesis of annonaceous acetogenins and analogs, RCM of unsaturated esters has been studied with the Grubbs benzylidene carbene catalyst to give 9 to 15 membered lactones in moderate to good yield. Cross metathesis between 2 carbohydrate derivatives and methyl undec-10-enoate is also reported.
Hanadi El Sukkari, Jean-Pierre Gesson, Brigitte Renoux   +2 more
openaire   +1 more source