Carbohydrate-substituted phosphines as new ligands for two-phase catalysis - Synthesis and application

Matthias Beller, Jürgen G.E. Krauter, Alexander Zapf, Sandra Bogdanovic

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The synthesis and catalytic application of a new class of polar hydrophilic phosphines for two-phase catalysis is described in full detail. Contrary to the well-known sulfonated phosphines the hydrophilic character of the ligands is attributed to a neutral carbohydrate moiety. Two general routes for the synthesis of monosaccharide substituted triarylphosphines are presented. In the first procedure protected halopyranoses and OH-substituted triphenylphosphines were combined under phase transfer conditions to generate carbohydrate-substituted phosphines. In a second more efficient protocol, the palladium-catalyzed coupling of suitable haloaryl glycosides with diphenylphosphine constitutes a new access to these ligands. The properties of the ligands in terms of solubility, surfactant activity, and partition between two non-miscible phases are discussed. In addition, superior catalytic performance compared to ionic hydrophilic ligands was demonstrated for important C-C coupling reactions such as the Suzuki, Heck, and hydroformylation reactions.

Original languageEnglish
Pages (from-to)279-290
Number of pages12
JournalCatalysis Today
Volume48
Issue number1-4
DOIs
StatePublished - 1999
Externally publishedYes

Keywords

  • Glycosides
  • Heck reaction
  • Hydroformylation
  • Phosphines
  • Suzuki reaction
  • Two-phase catalysis

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