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Synlett 2001; 2001(3): 0391-0393
DOI: 10.1055/s-2001-11386
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New Bifunctional Chelating Phosphine Ligands for Immobilization of Metal Complexes on Oxidic Supports

Georgios Tsiavaliaris* , Simone Haubrich, Christof Merckle, Janet Blümel
  • *Organisch-Chemisches Institut der Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany; Fax + 49(62 21)54 49 04; E-mail: J.Bluemel@urz.heidelberg.de
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Publication Date:
31 December 2001 (online)

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The immobilization of transition metal complexes by bifunctional phosphines containing ethoxysilane groups is of widespread interest. Especially desirable are chelating phosphines, since they can reduce leaching of the metal complexes. Easy syntheses of the bifunctional chelating ethoxysilane phosphines Ph2PCH2CH[OSi(OEt)3]CH2PPh2, and Ph2P(CH2)xPPh(CH2)ySi(OEt)3 (x = 2, 3; y = 2, 3), and the nickel derivative (CO)2Ni[Ph2P(CH2)2PPh(CH2)2Si(OEt)3] are reported. The ethoxysilane groups present convenient handles for immobilization on oxidic supports.

immobilized catalysts - bifunctional ligands - chelating ligands - silica support - solid-state NMR