Novel brønsted acidic ionic liquids and their use as dual solvent-catalysts

Amanda C. Cole, Jessica L. Jensen, Ioanna Ntai, Kim Loan T Tran, Kristin J. Weaver, David C. Forbes*, James H. Davis

*Corresponding author for this work

Research output: Contribution to journalArticle

1159 Scopus citations


The reaction of triphenylphosphine or N-butylimidazole with cyclic sultones gives zwitterions that are subsequently converted into ionic liquids by reaction with trifluoromethane sulfonic acid or p-toluenesulfonic acid. The resulting ionic liquids have cations to which are tethered alkane sulfonic acid groups. These Brønsted acidic ionic liquids are useful solvent/catalysts for several organic reactions, including Fischer esterification, alcohol dehydrodimerization and the pinacol rearrangement. The new ionic liquids combine the low volatility and ease of separation from product normally associated with solid acid catalysts, with the higher activity and yields normally found using conventional liquid acids.

Original languageEnglish (US)
Pages (from-to)5962-5963
Number of pages2
JournalJournal of the American Chemical Society
Issue number21
StatePublished - May 20 2002

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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