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  1. Alkyne metathesis - Wikipedia

    • Alkyne metathesis is an organic reaction involving the redistribution of alkyne chemical bonds. This reaction is closely related to olefin metathesis. Metal-catalyzed alkyne metathesis was first described in 1968 by Bailey, et al. The Bailey system utilized a mixture of tungsten and silicon oxides at temperatures as high as 450 °C. In 1974 Mortreux reported the use of a homogeneous catalyst—molybdenum hexacarbonyl at 160 °C—to observe an alkyne scrambling phenomenon, in which an...
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  2. Olefin metathesis - Wikipedia

    • Olefin metathesis Reaction type Carbon-carbon bond forming reaction Identifiers Organic Chemistry Portal olefin-metathesis RSC ontology ID RXNO:0000280 Olefin metathesis is an organic reaction that entails the redistribution of fragments of alkenes by the scission and regeneration of carbon-carbon double bonds. Because of the relative simplicity of olefin metathesis, it often creates fewer undesired by-products and hazardous wastes than alternative organic reactions. For their elucidation of the
    See more on en.wikipedia.org · Text under CC-BY-SA license
  3. Ring-Closing Alkyne Metathesis | Sigma-Aldrich


    Alkyne metathesis has been a useful tool for C–C bond formation since the discovery of structurally well-defined metal alkylidynes by Schrock and coworkers. 2 These complexes have found use in the synthesis of complex natural products and in material science. 3 The limitations of these catalysts include air- and moisture-sensitivity as well ...

  4. Alkyne Metathesis - an overview | ScienceDirect Topics


    Alkyne metathesis is a curious reaction in view of the fact that two alkyne triple bonds are cleaved and reconstructed simultaneously leading to different triple bonds. 68,68a The first reported effective catalyst is a heterogeneous mixture of tungsten oxide and silica. 69 Then Mortreux found that a catalytic system that consisted of Mo(CO) 6 and resorcinol was effective for alkyne metathesis.

  5. Alkyne Metathesis on the Rise - Fürstner - 2013 ...


    The early years of alkyne metathesis were marked by a somewhat ironic state of affairs: the proposed mechanism was swiftly validated and more than one effective catalyst became available shortly after the discovery of this transformation; surprisingly, however, the impact on synthesis remained very limited for a long period of time.

  6. Enyne Metathesis - organic-chemistry.org


    Using an alkyne and only 2-3 fold of excess of an alkene, the enyne metathesis allows the synthesis of cross-coupled products. Higher alkene concentration is beneficial to the reaction rate and helps keep the reactive intermediates in the enyne metathesis catalytic cycle.

  7. Alkyne Metathesis - Home - Department of Chemistry

    https://www2.chemistry.msu.edu/Courses/CEM958/10-11/talks/Nosrati.pdf · Файл PDF

    Alkyne Metathesis Catalyst Development and Application in Total Synthesis Meisam Nosrati January 19th, 2011. ... Nitrile Alkyne Cross Metathesis (NACM) Kürti, L. Czakó, B. Strategic Applications of Named Reactions in Organic Synthesis; Elsevier Academic Press: Burlington, MA 2005.

  8. Olefin Metathesis in Organic Synthesis - Princeton University

    https://www.princeton.edu/chemistry/macmillan/group-meetings/WSJ... · Файл PDF

    Olefin Metathesis in Organic Synthesis Wendy Jen MacMillan Group Meeting January 17, 2001 I. Well-defined alkene metathesis catalysts II. Applications of Olefin Metathesis A. Ring closing metathesis B. Cross metathesis C. Ring opening metathesis Recent Reviews: Furstner, A. Angew. Chem. Int.

  9. Alkyne Metathesis | Chem-Station ()


    (RCM)(ring-closing alkyne metathesis: RCAM) RCAM ...

  10. Alkyne metathesis: the making and breaking of carbon ...


    The groups of Jeoffrey S Moore and Wei Zhang have demonstrated the usefulness of alkyne metathesis for applications in supramolecular chemistry, while the groups of Colin Nuckolls and Felix R Fischer provided protocols for the controlled ring-opening alkyne metathesis polymerisation of cycloalkynes.

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