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Synthesis 1988; 1988(12): 953-955
DOI: 10.1055/s-1988-27763
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Convenient Procedures for the Preparation of Lipophilic Quaternary Onium Fluorides, Hydrogendifluorides and Dihydrogentrifluorides via Ion Exchange in Two-Phase Systems

Dario Landini* , Henriette Molinari, Michele Pensa, Alessandro Rampoldi
  • *Centro CNR e Dipartimento di Chimica Organica e Industriale dell'Università, Via Golgi 19, I-20133 Milano, Italy
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Publication Date:
20 August 2002 (online)

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A series of lipophilic quaternary onium fluorides 2, hydrogendifluorides 3, and dihydrogentrifluorides 4 are easily synthesized in almost quantitative yields from the corresponding quaternary hydrogen sulfates by exchange with the appropriate anion in an organic aqueous two-phase system; alternatively quaternary salts 4 can be prepared from onium chlorides 5 or bromides 6 under the same conditions.