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Catalysis Science & Technology Vol - 7 Issue - 5

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

Content Provider	Royal Society of Chemistry (RSC)
Author	Jiao, Yunzhe Torne, Marta Serrano Gracia, Jose Niemantsverdriet, J. W. (Hans) Leeuwen, Piet W. N. M. van
Copyright Year	2017
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.
Starting Page	1404
Ending Page	1414
Page Count	11
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	7
Issue Number	6
Journal	Catalysis Science & Technology
DOI	10.1039/c6cy01990k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Infrared spectroscopy Ligand Phosphine Hydroformylation Styrene Nuclear magnetic resonance spectroscopy Aldehyde Royal Ordnance L7
Content Type	Text
Resource Type	Article
Subject	Catalysis

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