Ligand effects in rhodium-catalyzed hydroformylation with bisphosphines: steric or electronic? - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Catalysis Science & Technology Year : 2017

Ligand effects in rhodium-catalyzed hydroformylation with bisphosphines: steric or electronic?

Abstract

Twelve commercially available bisphosphine ligands have been evaluated in rhodium-catalyzed hydroformylation reactions. All ligands exhibited high chemoselectivities for aldehyde formation. The highest enantioselectivity (53% ee) of styrene hydroformylation was achieved with (S)-BTFM-Garphos (L7) substituted with electron withdrawing substituents. High pressure NMR (HP-NMR) spectroscopy and in situ high pressure IR spectroscopy (HP-IR) were used to study the resting states of the catalyst species in the reactions. The ligand effect on the structures of the observable species was examined. Both electronic and steric factors were considered to contribute to the performance of the various ligands. The results showed that decreasing the phosphine basicity increased the enantioselectivity, while in the systems studied here the steric character plays a less important role than the electronic features in achieving good regioselectivities.
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Dates and versions

hal-02004053 , version 1 (01-02-2019)

Identifiers

  • HAL Id : hal-02004053 , version 1

Cite

Yunzhe Jiao, Marta Serrano Torne, Jose Gracia, J. Niemantsverdriet, Piet W N M van Leeuwen. Ligand effects in rhodium-catalyzed hydroformylation with bisphosphines: steric or electronic?. Catalysis Science & Technology, 2017, 7 (6), pp.1404-1414. ⟨hal-02004053⟩
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