Probing new classes of π-acceptor ligands for rhodium catalyzed hydroformylation of styrene
Three hitherto unexplored classes of strong π-acceptor ligands for use in homogeneous catalysis—phospha-π-aromatic compounds (class A), pyrrolyl phosphines (class B) and phosphenium cations (class C)—have been evaluatated for rhodium catalyzed hydroformylation of styrene. When testing monodentate li...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 May 1999
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| In: |
Journal of molecular catalysis. A, Chemical
Year: 1999, Jahrgang: 143, Heft: 1/3, Pages: 143-154 |
| DOI: | 10.1016/S1381-1169(98)00377-X |
| Online-Zugang: | Verlag, Pay-per-use, Volltext: http://dx.doi.org/10.1016/S1381-1169(98)00377-X Verlag, Pay-per-use, Volltext: http://www.sciencedirect.com/science/article/pii/S138111699800377X 
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| Verfasserangaben: | Bernhard Breit |
| Zusammenfassung: | Three hitherto unexplored classes of strong π-acceptor ligands for use in homogeneous catalysis—phospha-π-aromatic compounds (class A), pyrrolyl phosphines (class B) and phosphenium cations (class C)—have been evaluatated for rhodium catalyzed hydroformylation of styrene. When testing monodentate ligands, the ortho/ortho′-disubstituted phosphabenzene derivative 1b provided a rhodium-catalyst endowed with the highest catalytic activity. Based upon these results a first series of bidentate phosphabenzene ligands have been tailored employing the concept of an electronic differentiation of the two binding sites. An oxazoline/phosphabenzene system 8 which is capable of forming an eight-membered chelation ring gave the best results. Thus, a quantitative conversion of styrene at ambient temperature afforded the desired 2-phenylpropanal in high regioselectivity (25:1). |
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| Beschreibung: | Gesehen am 21.03.2018 |
| Beschreibung: | Online Resource |
| DOI: | 10.1016/S1381-1169(98)00377-X |