Carbonylation (hydroformylation and hydrocarbalkoxylation) reactions in the presence of transition metal: P-tert-butyl-calix[4]arene-based phosphine and phosphinite systems

Zsolt Csók, Gábor Szalontai, Gábor Czira, László Kollár

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

In this study, 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(2-diphenylphosphinoxy-ethoxy) calix[4]arene (5) and 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(2-diphenylphosphinoethoxy)- calix[4]arene (6), as well as their platinum and palladium complexes (PtCl2)2(5), (PdCl2)2(5) were synthesised and characterised. In addition to these transition metal-containing complexes the catalytic systems formed in situ, from catalytic precursors PtCl2(PhCN)2, [Rh(nbd)Cl]2 and PdCl2(PhCN)2 and the corresponding calixarene ligand, were tested as catalysts in hydroformylation and hydrocarbalkoxylation, respectively. High chemoselectivity was obtained in hydroformylation in the presence of rhodium-containing catalysts both with the above calixarene-based phosphine and phosphinite ligands. The regioselectivity towards branched aldehyde shows a strong temperature dependence in case of phosphinite derivative. Although the platinum-containing systems show much lower catalytic activity, the regioselectivities are undoubtedly higher than those obtained with PtCl2(diphosphine)-SnCl2 systems.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalJournal of Organometallic Chemistry
Volume570
Issue number1
DOIs
Publication statusPublished - Nov 10 1998

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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