Hydroformylation of styrene using thiolato-pyrazolate bridge rhodium catalysts modified with phosphorous ligands

  1. Orejón, A. 1
  2. Claver, C. 1
  3. Oro, L.A. 3
  4. Elduque, A. 3
  5. Pinillos, M.T. 2
  1. 1 Universitat Rovira i Virgili
    info

    Universitat Rovira i Virgili

    Tarragona, España

    ROR https://ror.org/00g5sqv46

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  3. 3 Instituto de Nanociencia y Materiales de Aragón
    info

    Instituto de Nanociencia y Materiales de Aragón

    Zaragoza, España

    ROR https://ror.org/031n2c920

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Revista:
Journal of Molecular Catalysis A: Chemical

ISSN: 1381-1169

Año de publicación: 1998

Volumen: 136

Número: 3

Páginas: 279-284

Tipo: Artículo

DOI: 10.1016/S1381-1169(98)00066-1 SCOPUS: 2-s2.0-0032556635 WoS: WOS:000077201700008 GOOGLE SCHOLAR

Otras publicaciones en: Journal of Molecular Catalysis A: Chemical

Resumen

Catalytic precursor systems prepared using [Rh2(μ-pz)(μ- SBu')(COD)2] in the presence of triphenylphosphine and chiral diphosphines are active in styrene hydroformylation. The effect of the pressure and the dependence on the P/Rh ratio are studied. When triphenylphosphine is used as phosphorous ligand complete conversion to aldehydes and regioselectivities as high as 90% in 2-phenylpropanal are obtained at very mild conditions. The use of (+)-(2R,4R)(-)-(2S,4S)-2,4-bis(diphenylphosphino)pentane ((+)-BDPP) or (- )-(2S,4S) ((-)-BDPP) as chiral diphosphine in a P/Rh ratio of 2 provides 95% regioselectivity and enantiomeric excess as high as 50%.