Search Results - "Blechert, S"

Synthesis and metathesis reactions of a phosphine-free dihydroimidazole carbene ruthenium complex by Gessler, Simon, Randl, Stefan, Blechert, Siegfried

“…Synthesis and activity in ring closure metathesis (RCM) and cross metathesis (CM) of the phosphine-free 1,3-dimesityl-4,5-dihydroimidazole-2-ylidene (IHMes)…”
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Enantioselective Synthesis of Tetraponerines by Pd- and Ru-Catalyzed Domino Reactions by Stragies, Roland, Blechert, Siegfried

“…An enantioselective synthesis of tetraponerines T4, T6, T7, and T8 in 24−36% overall yield is described. Key steps in this synthesis are a Pd-catalyzed domino…”
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The octadecanoic pathway: signal molecules for the regulation of secondary pathways by Blechert, Siegfried, Brodschelm, Wilhelm, Hölder, Swen, Kammerer, Lothar, Kutchan, Toni M., Mueller, Martin J., Xia, Zhi-Qiang, Zenk, Meinhart H.

“…Plant defense against microbial pathogens and herbivores relies heavily on the induction of defense proteins and low molecular weight antibiotics. The signals…”
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A versatile synthesis of substituted tetrahydropyridines by Schürer, Stephan C., Blechert, Siegfried

“…A short and efficient synthesis of highly substituted tetrahydropyridines is achieved by a combination of enyne cross metathesis and aza-Diels-Alder reaction…”
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Photochemically Induced Electron Transfer (PET) Catalyzed Radical Cyclization:  A Practical Method for Inducing Structural Changes in Peptides by Formation of Cyclic Amino Acid Derivatives by Jonas, Marco, Blechert, Siegfried, Steckhan, Eberhard

“…A new radical cyclization reaction of unsaturated amino acid derivatives is presented. The reaction is induced by photoelectron transfer (PET) catalysis and…”
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Structure-activity analyses reveal the existence of two separate groups of active octadecanoids in elicitation of the tendril-coiling response of Bryonia dioica Jacq by Blechert, S, Bockelmann, C, Fusslein, M, Schrader, T, Stelmach, B, Niesel, U, Weiler, E.W

“…The Bryonia dioica tendril-coiling assay provides a rapid, sensitive and selective bioassay for jasmonates. Using this assay, a large number of jasmonate and…”
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Recent Developments in Olefin Cross-Metathesis by Connon, Stephen J., Blechert, Siegfried

“…Among the many types of transition‐metal‐catalyzed CC bond‐forming reactions, olefin metathesis has come to the fore in recent years owing to the wide range…”
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A New Highly Efficient Ruthenium Metathesis Catalyst by Wakamatsu, Hideaki, Blechert, Siegfried

“…Olefin metathesis even at 0°C! A phenyl substituent in the ruthenium catalyst 2 leads to greatly increased initiation rates in different metathesis reactions,…”
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A Highly Active and Air-Stable Ruthenium Complex for Olefin Metathesis by Wakamatsu, Hideaki, Blechert, Siegfried

“…A bulky binol‐based ligand is the key structural feature of the ruthenium complex 1, which displays an unprecedented metathesis activity combined with high…”
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Ruthenium Metathesis Catalysts with Saturated Unsymmetrical N-Heterocyclic Carbene Ligands by Vehlow, Kati, Maechling, Simon, Blechert, Siegfried

“…The facile synthesis of two new unsymmetrical N-heterocyclic carbene (NHC) ligands from commercially available monosubstituted diamines is presented. The…”
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Sequential Catalysis: A Metathesis/Dihydroxylation Sequence by Beligny, Samuel, Eibauer, Stefan, Maechling, Simon, Blechert, Siegfried

“…A real step‐saver: A single ruthenium–carbene complex catalyzes a sequence of two reactions, namely, a metathesis reaction (ring‐closing or cross metathesis)…”
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Olefin metathesis–recent applications in synthesis by Blechert, Siegfried

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A concise synthesis of (-)-centrolobine via a diastereoselective ring rearrangement metathesis-isomerisation sequence by Böhrsch, Verena, Blechert, Siegfried

“…A total synthesis of (-)-centrolobine (1) based on a diastereoselective ring rearrangement metathesis-double bond isomerisation sequence and a one-pot cross…”
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Intramolecular Hydroamination of Functionalized Alkenes and Alkynes with a Homogenous Zinc Catalyst by Zulys, Agustino, Dochnahl, Maximilian, Hollmann, Dirk, Löhnwitz, Karolin, Herrmann, Jost-Steffen, Roesky, Peter W., Blechert, Siegfried

“…Simple and versatile: A new zinc complex catalyzes the intramolecular hydroamination of nonactivated alkynes and alkenes (see example in scheme;…”
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Total Synthesis of (+)-Phomopsolide C by Ring-Size Selective Ring-Closing Metathesis/Cross-Metathesis by Michaelis, Simon, Blechert, Siegfried

“…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…”
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Highly Active Silica Gel-Supported Metathesis (Pre)Catalysts by Fischer, Dirk, Blechert, Siegfried

“…Highly active Hoveyda–Grubbs and Hoveyda–Blechert type (pre)catalysts, immobilized on silica gel, are presented. These (pre)catalysts are synthesized in a few…”
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Effective and Inexpensive Acrylonitrile Cross-Metathesis: Utilisation of Grubbs II Precatalyst in the Presence of Copper(I) Chloride by Rivard, Michael, Blechert, Siegfried

“…The efficient selective cross‐metathesis (CM) of acrylonitrile using unmodified precatalyst 2 is reported. The use of copper(I) chloride as an additive and…”
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Mise en Évidence de Nouveaux Analogues du Taxol Extraits de Taxus baccata by Sénilh, V, Blechert, S, Colin, M, Guénard, D, Picot, F, Potier, P, Varenne, P

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Synthesis of γ,δ-Unsaturated-β-keto Lactones via Sequential Cross Metathesis−Lactonization:  A Facile Entry to Macrolide Antibiotic (−)-A26771B by Gebauer, Julian, Blechert, Siegfried

“…A simple access to γ,δ-unsaturated-β-keto lactones is presented, allowing a rapid total synthesis of the naturally occurring 16-membered macrolide antibiotic…”
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Synthesis of cis-Fused Carbo-Bicycles by Domino Enyne Cross-Metathesis/Intramolecular Diels−Alder Reaction by Mix, Stefan, Blechert, Siegfried

“…A sequential combination of Ru-catalyzed enyne cross-metathesis (EYCM) and intramolecular Diels−Alder reaction (IMDA) is described. Different terminal alkynes…”
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