Journal of Synthetic Organic Chemistry, Japan
Online ISSN : 1883-6526
Print ISSN : 0037-9980
Chemistry of Ammonium Betaines: Application to Ion-Pair Catalysis for Selective Organic Transformations
Daisuke UraguchiTakashi Ooi
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2018 Volume 76 Issue 11 Pages 1144-1153


The ammonium betaine was developed as an intramolecular ion-pair catalyst for realizing cooperative catalysis of a cation and anion; i.e. ion-pair catalysis. Combination of the stereocontrolling ability of the chiral ammonium ion and functions of the pairing aryloxylate ion enabled bifunctional organic base catalysis and ionic nucleophilic catalysis, which facilitate a variety of organic transformations with rigorous stereochemical control. In addition, employing a single-electron-accepting cation as a partner of the basic aryloxylate led to the development of a chemical redox catalyst with the capability of proton-coupled electron transfer (PCET). This research demonstrates a power of the ion-pair catalysis in selective organic synthesis and is therefore likely to stimulate further study in this field.

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© 2018 The Society of Synthetic Organic Chemistry, Japan
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