SO3H-functionalized ionic liquids as efficient and recyclable catalysts for the synthesis of pentaerythritol diacetals and diketals

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Abstract

The efficient, simple and environmentally friendly synthesis of pentaerythritol diacetals and diketals using SO3H-functionalized ionic liquids (ILs) as catalysts was reported. The ILs showed high catalytic activities and reusabilities with good to excellent yields of the desired products. H0 (Hammett function) values and the minimum-energy geometries of SO3H-functionalized ILs were determined and the results revealed that the acidities and catalytic activities of ILs in acetalization were related to their structures. The IL [PSPy][OTf] with the shortest H-O bond distance had the strongest acidity and the highest catalytic activity in the synthesis of pentaerythritol diacetals and diketals.

Original languageEnglish
Pages (from-to)7-16
Number of pages10
JournalJournal of Molecular Catalysis A: Chemical
Volume322
Issue number1-2
DOIs
StatePublished - 1 May 2010

Keywords

  • Ab initio calculation
  • Pentaerythritol diacetals and diketals
  • SOH-functionalized ionic liquids
  • Structure-catalytic activity relationship

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