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  2. Alkynylation - Wikipedia

    en.wikipedia.org/wiki/Alkynylation

    Several modifications of alkynylation reactions are known: In the Arens–van Dorp synthesis the compound ethoxyacetylene [7] is converted to a Grignard reagent and reacted with a ketone, the reaction product is a propargyl alcohol.

  3. Asymmetric addition of alkynylzinc compounds to aldehydes

    en.wikipedia.org/wiki/Asymmetric_Addition_of...

    This alkynylation reaction is enantioselective and involves an alkynylzinc reagent [1] rather than the sodium acetylide used by John Ulric Nef in his 1899 report of the synthetic approach. [ 2 ] [ 3 ] Propargyl alcohols are versatile precursors for the chirally-selective synthesis of natural products and pharmaceutical agents , making this ...

  4. Sonogashira coupling - Wikipedia

    en.wikipedia.org/wiki/Sonogashira_coupling

    The alkynylation reaction of aryl halides using aromatic acetylenes was reported in 1975 in three independent contributions by Cassar, [4] Dieck and Heck [5] as well as Sonogashira, Tohda and Hagihara. [6] All of the reactions employ palladium catalysts to afford the same reaction products.

  5. File:Alkynylation.svg - Wikipedia

    en.wikipedia.org/wiki/File:Alkynylation.svg

    English: Diagram showing the chemical reaction involving Sonogashira reaction of a phenylalanine derivative with an alkyne. Modified from File:Alkynylation.gif to correct chemical errors. Date

  6. Favorskii reaction - Wikipedia

    en.wikipedia.org/wiki/Favorskii_reaction

    The Favorskii reaction is an organic chemistry reaction between an alkyne and a carbonyl group, under basic conditions. The reaction was discovered in the early 1900s by the Russian chemist Alexei Yevgrafovich Favorskii .

  7. Alkyne zipper reaction - Wikipedia

    en.wikipedia.org/wiki/Alkyne_zipper_reaction

    The alkyne zipper reaction is an organic reaction that involves isomerization of a non terminal alkyne into a terminal alkyne. This reaction was first reported by Alexey Favorsky in 1887 (J. Russ. Phys.-Chem. Soc., 19, 414 (1887)). Also, this reaction was reported by Charles Allen Brown and Ayako Yamashita in 1975. [1]

  8. Transition metal alkyne complex - Wikipedia

    en.wikipedia.org/wiki/Transition_metal_alkyne...

    When bonded side-on to a single metal atom, an alkyne serves as a dihapto usually two-electron donor. For early metal complexes, e.g., Cp 2 Ti(C 2 R 2), strong π-backbonding into one of the π* antibonding orbitals of the alkyne is indicated.

  9. Corey–Fuchs reaction - Wikipedia

    en.wikipedia.org/wiki/Corey–Fuchs_reaction

    The Corey–Fuchs reaction, also known as the Ramirez–Corey–Fuchs reaction, is a series of chemical reactions designed to transform an aldehyde into an alkyne. [1] [2] [3] The formation of the 1,1-dibromoolefins via phosphine-dibromomethylenes was originally discovered by Desai, McKelvie and Ramirez. [4]