Rhodium-Catalyzed Hydroformylation and Deuterioformylation with Pyrrolyl-Based Phosphorus Amidite Ligands: Influence of Electronic Ligand Properties

Autor: S.C. van der Slot, J. Duran, Paul C. J. Kamer, Jordy Luten, P.W.N.M. van Leeuwen
Přispěvatelé: Homogeneous and Supramolecular Catalysis (HIMS, FNWI)
Rok vydání: 2002
Předmět:
Zdroj: Organometallics, 21, 3873-3883. American Chemical Society
ISSN: 0276-7333
DOI: 10.1021/om010760y
Popis: The influence of electronic ligand properties on the catalyst performance in the rhodium-catalyzed hydroformylation of alkenes has been investigated. Two bidentate phosphorus amidite and phosphinite ligands have been synthesized: 1,1‘-biphenyl-2,2‘-diyl-bis(dipyrrolylphosphoramidite) (3) and 1,1‘-biphenyl-2,2‘-diyloxy-bis(diphenylphosphinite) (4). Their monodentate analogues have also been studied: phenyldipyrrolylphosphoramidite (1) and phenyl diphenylphosphinite (2). These two sets of ligands have very similar steric properties but the amidites are much stronger π-acceptor ligands. Spectroscopic studies showed that under hydroformylation reaction conditions the monodentate ligands 1 and 2 form mixtures of HRhL2(CO)2 and HRhL3(CO) complexes depending on the ligand and rhodium concentrations and the carbon monoxide pressure. Depending on the reaction conditions, the bidentate ligands 3 and 4 form mixtures of HRh(L∩L)(CO)2 and HRh(L∩L)(L∩L‘)(CO), where L∩L‘ functions as a monodentate. All ligands have be...
Databáze: OpenAIRE