Novel rhodium catalyst for asymmetric hydroformylation of styrene: Study of electronic and steric effects of phosphorus seven-membered ring ligands

Giulia Erre, Stephan Enthaler, Kathrin Junge, Serafino Gladiali, Matthias Beller

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The asymmetric hydroformylation of styrene catalysed by rhodium complexes modified by monodentate phosphepine ligands has been investigated. The effects of a systematic variation of the phosphorus substituent on catalytic activity and selectivity are reported as well as the outcome of a combinatorial approach for the formation of mixed ligands complexes with several commercially available ligands. Effective catalytic systems have been devised for the reaction that provide for full conversion within 24 h and regioselectivity up to 96% in the branched aldehyde and enantioselectivities up to 48%. The use of bidentate ligands built up by binaphthyl-supported seven-membered phosphacyclic units does not allow for further improvement in the reaction outcome.

Original languageEnglish
Pages (from-to)148-155
Number of pages8
JournalJournal of Molecular Catalysis A: Chemical
Volume280
Issue number1-2
DOIs
StatePublished - 4 Feb 2008
Externally publishedYes

Keywords

  • Asymmetric hydroformylation
  • Monodentate phosphines
  • Rhodium

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