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Quaternary Ammonium Salts in Organocatalysis New Book

  • Fluorous Chemistry

    Fluorous Chemistry
    István T. Horváth

    Structural, Physical, and Chemical Properties of Fluorous Compounds, by J.A. Gladysz Selective Fluoroalkylation of Organic Compounds by Tackling the “Negative Fluorine Effect”, by W. Zhang, C. Ni and J. Hu Synthetic and Biological …

  • Asymmetric Organocatalysis

    Asymmetric Organocatalysis
    Albrecht Berkessel, Harald Gröger

    Although replacement of the required mercury salt would be desirable, this in situ preparation of the enolate and … Aldol reactions using a quaternary chinchona alkaloid-based ammonium salt as organocatalyst Several quaternary ammonium  …

  • Comprehensive Enantioselective Organocatalysis

    Comprehensive Enantioselective Organocatalysis
    Peter I. Dalko

    Indeed, phasetransfercatalysis hasinmany instances been applied successfully with quaternary ammonium salts derived from natural cinchona alkaloids [112]. The first exampleof phasetransfer catalysis witha cinchonaalkaloid derivative was  …

  • Stereoselective Organocatalysis

    Stereoselective Organocatalysis
    Ramon Rios Torres

    In particular, the asymmetric alkylation of glycine-derived Schiff bases by means of phase-transfer organocatalysis, pioneered … This ionic complex reacts with the electrophile, liberating the product and the quaternary ammonium salt, which …

  • Enantioselective Organocatalysis

    Enantioselective Organocatalysis
    Peter I. Dalko

    Takashi Ooi and Keiji Maruoka 4.1 Introduction Chiral, nonracemic quaternary ammonium salts have been emerging as a powerful metal-free catalyst for effecting various stereoselective bond-forming reactions under mild conditions.

  • Quaternary Ammonium Salts

    Quaternary Ammonium Salts
    R. Alan Jones

    This text provides experimental methods for a wide range of organic reactions, systematically arranged according to reaction type, and describes the advantages and limitations of the procedures.

  • Organocatalysis

    Organocatalysis
    Manfred Reetz, Benjamin List, Stefan Jaroch, Hilmar Weinmann

    A quaternary ammonium salt was easily synthesized on a modified MeOPEG, and this supported catalyst was shown to be an efficient and recoverable promoter of several reactions carried out under PTC conditions. Catalyst 13 showed a …

  • Organocatalytic Enantioselective Conjugate Addition Reactions

    Organocatalytic Enantioselective Conjugate Addition Reactions
    Jose L. Vicario

    N R R Quaternary ammonium cation for interacting with the nucleophile anion Stabilizes developing negative charge … of the catalyst Figure 5.3 Relevant aspects of the design of axially chiral ammonium salts as PTC catalysts. the C-9 oxygen …

  • Asymmetric Organocatalysis in Natural Product Syntheses

    Asymmetric Organocatalysis in Natural Product Syntheses
    Mario Waser

    JAm Chem Soc 111: 2353 Corey EJ, Xu F, Noe MC (1997) A Rational Approach to Catalytic Enantioselective Enolate Alkylation Using a Structurally Rigidified and Defined Chiral Quaternary Ammonium Salt Under Phase Transfer Conditions.

  • Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis

    Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis
    Shinichi Itsuno

    The facile immobilization allowed for combinatorial screening of the desired chiral organocatalysts for the asymmetric … One of the best immobilization methods for these chiral organocatalysts with quaternary ammonium salt at present is …

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