Results 71 to 80 of about 938,190 (242)

Beyond catalyst deactivation: cross-metathesis involving olefins containing N-heteroaromatics

Beilstein Journal of Organic Chemistry, 2015
Alkenes containing N-heteroaromatics are known to be poor partners in cross-metathesis reactions, probably due to catalyst deactivation caused by the presence of a nitrogen atom.
Kevin Lafaye, Cyril Bosset, Lionel Nicolas, Amandine Guérinot, Janine Cossy   +4 more
doaj   +1 more source

Total Synthesis of (-)-(7S,10R)-Calamenene and (-)-(7S,10R)-2-Hydroxycalamenene by Use of a Ring-Closing Metathesis Reaction. A Comparison of the cis- and trans-Isomers

Molecules, 2002
The title compounds have been synthesized starting from l-menthone by application of a ring-closing metathesis reaction to confirm their reported absolute and relative stereochemistry.
Yoshinori Asakawa, Fumihiro Nagashima, Motoo Tori, Masakazu Sono, Masashi Imoto, Katsuyuki Nakashima   +5 more
doaj   +1 more source

A Synthetic Approach Toward a Brominated Oxocane Labdane Diterpenoid Isolated From

Natural Product Communications, 2020
The synthesis of a labdane oxocane epoxy-alcohol is described starting from the Wieland–Miescher ketone derivative via ring closing olefin metathesis of a diene derivative, targeting the total synthesis of a brominated oxocane labdane diterpenoid ...
Hisahiro Hagiwara, Shohei Fujiwara, Chikako Iibachi, Toshio Suzuki, Takashi Hoshi   +4 more
doaj   +1 more source

A Comprehensive Review on Additive Manufacturing of Smart Components: Technologies, Applications, and Future Scope

Advanced Intelligent Systems, EarlyView.
How can additive manufacturing enable components that sense, adapt, heal, and power themselves? This review synthesizes recent advances in smart functionalities, manufacturing technologies, and intelligent design strategies, revealing a pathway toward fully integrated, autonomous, and multifunctional systems across diverse engineering sectors. Additive
Aiswarya Rony, P. M. Ushasree, Michael Short, Jinoop Arackal Narayanan   +3 more
wiley   +1 more source

Triquinanes: A “One-Pot” IMDA-Tandem Metathesis Cascade Strategy: Ring-Closing Metathesis (RCM) Dominates Norbornene ROM!

, 2016
A general route to linear triquinanes including a formal synthesis of (±)-Δ9(12)-capnellene is described. This cascade strategy combines an intramolecular Diels−Alder reaction tandem metathesis protocol to generate the linear cis-anti-cis-tricyclo[6.3.0 ...
Nicole Stogaitis (2305273), Natalie N. M. Nguyen (2305279), Mathieu Leclère (2167723), Alex G. Fallis (2305276)   +3 more
core   +2 more sources

Efficient catalytic alkyne metathesis with a fluoroalkoxy-supported ditungsten(III) complex

Beilstein Journal of Organic Chemistry, 2018
The molybdenum and tungsten complexes M2(OR)6 (Mo2F6, M = Mo, R = C(CF3)2Me; W2F3, M = W, R = OC(CF3)Me2) were synthesized as bimetallic congeners of the highly active alkyne metathesis catalysts [MesC≡M{OC(CF3)nMe3−n}] (MoF6, M = Mo, n = 2; WF3, M = W ...
Henrike Ehrhorn, Janin Schlösser, Dirk Bockfeld, Matthias Tamm   +3 more
doaj   +1 more source

Total Synthesis of (+)-Phomopsolide C by Ring-Size Selective Ring-Closing Metathesis/Cross-Metathesis

, 2016
A new strategy for the synthesis of chiral 6-substituted 5,6-dihydro-5-hydroxypyran-2-ones by ring-size selective ring-closing metathesis (RCM) and its application to a short total synthesis of (+)-phomopsolide C are described.
Simon Michaelis (2089381), Siegfried Blechert (2032447)   +1 more
core   +1 more source

Consequences of the electronic tuning of latent ruthenium-based olefin metathesis catalysts on their reactivity

Beilstein Journal of Organic Chemistry, 2015
Two ruthenium olefin metathesis initiators featuring electronically modified quinoline-based chelating carbene ligands are introduced. Their reactivity in RCM and ROMP reactions was tested and the results were compared to those obtained with the parent ...
Karolina Żukowska, Eva Pump, Aleksandra E. Pazio, Krzysztof Woźniak, Luigi Cavallo, Christian Slugovc   +5 more
doaj   +1 more source

Ring closing metathesis of phenyl-substituted dienes

, 1999
A series of phenyl-substituted heterodienes 2a-f and 6 was prepared and subjected to ring closing metathesis (RCM) to give differently phenyl- substituted dihydropyrroles and ...
Bujard, M, Mioskowski, C, A. Briot, Gouverneur, Veronique, Briot, A, C. Mioskowski, M. Bujard, V. Gouverneur   +7 more
core   +1 more source

Olefin Metathesis Reaction in Water and in Air Improved by Supramolecular Additives

Molecules, 2015
A range of water-immiscible commercially available Grubbs-type precatalysts can be used in ring-closing olefin metathesis reaction in high yields. The synthetic transformation is possible in pure water under ambient conditions.
Jasmine Tomasek, Miriam Seßler, Harald Gröger, Jürgen Schatz   +3 more
doaj   +1 more source