Results 131 to 140 of about 938,190 (242)

Sulfur‐ and Selenium‐Decorated Coumarins: Synthetic Strategies Involving Cyclization and Late‐Stage Functionalization

The Chemical Record, EarlyView.
Two decades of synthetic strategies for sulfur‐, selenium‐decorated coumarins are critically surveyed through 44 literature reports, with particular emphasis on derivatives functionalized at the C‐3 and C‐4 positions. This review reports the direct construction of the coumarin framework through cyclization processes and late‐stage functionalization of ...
Bruna R. Schneider, Laura D. de Avila, Mauricio C. D. F. Xavier, Alex F. C. Flores, Liane K. Soares, Gabriel P. da Costa, Angelita M. Barcellos   +6 more
wiley   +1 more source

Selective Domino Ring-Closing Metathesis−Cross-Metathesis Reactions between Enynes and Electron-Deficient Alkenes

, 2016
A selective domino ring-closing metathesis (RCM)−cross-metathesis (CM) process between enynes and electron-deficient alkenes is reported. The conditions have been optimized for enynes 3 and methyl acrylate with catalyst IV.
Claire Vilain (3067122), Laurence Grimaud (1921282), Laurent Elkaïm (3067119), Frédérique Royer (3028911)   +3 more
core   +1 more source

Group 13 Aminopyridinato Complexes and Co─Al Heterobimetallics: Impact of Ligand Substituent and Metal Exchange on Thermal Behavior

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
A family of monometallic aluminum and gallium complexes supported by simple aminopyridinato ligands was synthesized and fully characterized by NMR spectroscopy and single‐crystal X‐ray diffraction. In addition, two Co─Al heterobimetallic complexes were synthesized and structurally characterized.
Pauline B. Lemp, Christina Kallen, Timothy M. Schwartz, Gregor Schnakenburg, Veronika Brune, Sanjay Mathur, Connie C. Lu   +6 more
wiley   +1 more source

Ring closing metathesis

, 2006
K. Krohn, N. Böker
openaire   +3 more sources

Synergistic Silylium‐Ion and Palladium Catalysis Enables Migratory Alkene Silylation With Allylsilanes by Formal C–H/C–Si Metathesis

Angewandte Chemie, Volume 138, Issue 44, 26 October 2026.
Merging silylium‐ion and palladium catalysis provides a mechanistically distinct route to allylsilanes by formal C–H/Si–H metathesis. Using allylsilanes as silicon proelectrophiles, various allylarenes undergo migrative silylation, selectively yielding (E)‐allylsilanes.
Longhui Duan, Zheng‐Wang Qu, Stefan Grimme, Elisabeth Irran, Hendrik F. T. Klare, Martin Oestreich   +5 more
wiley   +2 more sources

Highly efficient Ru(ii)-alkylidene based Hoveyda-Grubbs catalysts for ring-closing metathesis reactions. [PDF]

RSC Adv, 2021
Al-Enezi MY, John E, Ibrahim YA, Al-Awadi NA.   +3 more
europepmc   +1 more source

Ring‐Retentive Allylation of Cyclopropanols Through Interception of Enolized Homoenolates by π‐Allylpalladium

Angewandte Chemie, Volume 138, Issue 44, 26 October 2026.
Cyclopropanols undergo palladium‐catalyzed, zinc‐mediated allylation with allyl acetates: the ring opens transiently to an enolized homoenolate, is intercepted by π‐allylpalladium, and recloses to furnish β‐allylated cyclopropanols. This formal “allylic cyclopropylation” broadens the reaction space for ring‐retentive functionalization of cyclopropanols.
Kento Tsukiji, Sena Miura, Naohiko Yoshikai   +2 more
wiley   +2 more sources

Domino Ring-Opening Metathesis–Ring-Closing Metathesis of Bicyclo[2.2.2]octene Derivatives: Scope and Limitations

, 2016
Domino metathesis involving ring-opening metathesis–ring-closing metathesis (ROM–RCM) of a bicyclo[2.2.2]­octene derivative having an appropriate alkene chain, expected to produce a 7/6 fused bicyclic system, provided a decalin system in contrast to ROM ...
Manju Ghosh (2062648), Subrata Ghosh (124413), Sritama Bose (2062645)   +2 more
core   +1 more source

Ruthenium-Catalyzed Ring-Opening and Ring-Closing Enyne Metathesis

, 2016
When a CH2Cl2 solution of an enyne containing the cycloalkene moiety was stirred in the presence of ruthenium−carbene complex (10 mol %) at room temperature under ethylene gas (1 atm), ring-opening and ring-closing metathesis occurred to afford cyclized ...
Tsuyoshi Kitamura (2693950), Miwako Mori (2404840)   +1 more
core   +1 more source

Conformational Fixation and Experimentally Guided Modeling of Excited‐State Relaxation in 3‐Morpholino Propenylidene Indolone Merocyanines

Aggregate, Volume 7, Issue 11, November 2026.
Conformational fixation of donor–acceptor merocyanines modulates excited‐state relaxation and fluorescence. Viscosity‐ and aggregation‐dependent emission, combined with TDDFT calculations, reveal a strongly twisted charge‐separated state in solution and a torsionally constrained emissive state in rigid environments, establishing a unified picture of ...
Christian Muschelknautz, Larissa Brandner, Klaus Schaper, Bernhard Mayer, Thomas J. J. Müller   +4 more
wiley   +1 more source