نتایج جستجو برای: alkyne

تعداد نتایج: 2429  

Journal: :Chemical communications 2010
Takuya Ozawa Hiroaki Horie Takuya Kurahashi Seijiro Matsubara

Intermolecular [2+2+1] cycloaddition which incorporates an alkyne, an isocyanate, and an alkene into a γ-butyrolactam proceeds with nickel catalyst.

Journal: :Dalton transactions 2009
Anthony C Coleman Conor Long Auke Meetsma Ben L Feringa Wesley R Browne Mary T Pryce

Visible light driven decarbonylation of [(mu(2)-alkyne)Co(2)(CO)(6)] complexes enables the formation of cyclopentenones in good yields at ambient temperatures.

Journal: :Chemical communications 2006
Béatrice Quiclet-Sire Samir Z Zard

The reaction of hydrazones with iodine/base leads to diazo intermediates that can be trapped by an internal alkene or alkyne.

Journal: :Chemical Communications 2021

Enantioselective nickel-catalyzed reactions of (hetero)arylboronic acids or alkenylboronic with substrates containing an alkyne tethered to various acyclic electron-deficient alkenes are described.

Journal: :Chinese Journal of Polymer Science 2011

Journal: :Chemical communications 2014
Evandro M Alexandrino Philipp Buchold Manfred Wagner Adrian Fuchs Andreas Kreyes Clemens K Weiss Katharina Landfester Frederik R Wurm

The interface as a "screw clamp": the copper-free 1,3-dipolar azide-alkyne cycloaddition at the interface of nanodroplets in miniemulsions was studied in detail by NMR spectroscopic methods. The reaction at the oil-water interface proved to exhibit higher rate constants, increased molecular weights and high regioregularity compared to the reaction in solution.

Journal: :Dalton transactions 2010
Philipp Heinz Michael Puchberger Maria Bendova Stefan O Baumann Ulrich Schubert

The clusters Ti(6)O(4)(OPr)(8)(OOC(CH(2))(2)C[triple bond]CH)(8) and [Zr(6)O(4)(OH)(4)(OOC(CH(2))(3)C[triple bond]CH)(12)](2) with acetylenic carboxylate ligands were prepared and structurally characterized in solution and in the crystalline state. Model reactions showed that they are suitable candidates for the formation of cluster-based inorganic-organic hybrid materials by alkyne-azide click...

Journal: :Angewandte Chemie 2010
Felix R Fischer Colin Nuckolls

Despite the tremendous impact of alkene ring-opening metathesis polymerization (ROMP) on the design and the synthesis of polymers and functional materials, examples for the analogous alkyne ROMP remain scarce. This imbalance can be rationalized by the limited availability of commercially available catalysts and the lack of alkyne metathesis monomers. We present here the synthesis and a systemat...

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