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

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

Enamide−Olefin Ring-Closing Metathesis

, 2016
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 ...
Jan H. van Maarseveen (1489900), Floris P. J. T. Rutjes (1450666), Sape S. Kinderman (2355052), Henk Hiemstra (1387788), Hans E. Schoemaker (2418688)   +4 more
core   +1 more source

Synthesis of 2H-Chromenes via Hydrazine-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis [PDF]

, 2019
The catalytic ring-closing carbonyl-olefin metathesis (RCCOM) of O-allylsalicylaldehydes to form 2H-chromenes is described. The method utilizes a [2.2.1]-bicyclic hydrazine catalyst and operates via a [3+2]/retro-[3+2] metathesis manifold. The nature of
Tristan, Lambert, Yunfei, Zhang, Janis, Jermaks, Samantha N., Macmillan   +3 more
core   +1 more source

Catalytic Enantioselective Ring-Closing Metathesis by a Chiral Biphen−Mo Complex

, 2016
Catalytic Enantioselective Ring-Closing Metathesis by a Chiral Biphen−Mo ...
John B. Alexander (2988690), Richard R. Schrock (1295601), Amir H. Hoveyda (1306548), Dustin R. Cefalo (2983722), Daniel S. La (2025589)   +4 more
core   +2 more sources

Synthesis of indole-based propellane derivatives via Weiss–Cook condensation, Fischer indole cyclization, and ring-closing metathesis as key steps

Beilstein Journal of Organic Chemistry, 2013
A variety of highly functionalized indole-based [n.3.3]propellane derivatives is described. The synthesis of the propellane derivatives involves a Weiss–Cook condensation, a Fischer indole cyclization, and a ring-closing metathesis as key steps.
Sambasivarao Kotha, Ajay Kumar Chinnam, Arti Tiwari   +2 more
doaj   +1 more source