Design, synthesis and application of supramolecular ligands in asymmetric hydrogenation and hydroformylation

Identifier:  TDX:1367

Handle: https://hdl.handle.net/20.500.11797/TDX1367

Authors:  Mon Quílez, Ignacio

Abstract:
In the present PhD Thesis, two families of supramolecular bis(phosphite) and bis(phosphine) ligands have been designed and synthesized. These ligands combine a catalytic site for enantioselective organometallic catalysis and a regulation site based on a polyoxyethylene chain for ion-dipole non-covalent interactions. The concept of regulation has been proven inrhodium-mediated asymmetric hydroformylation and hydrogenation reactions of different alkenes using catalysts derived from the ligands that incorporate a distal regulation site. Parameters such as catalyst activity and enantioselectivity (and regioselectivity for hydroformylation) were improved by thesimple addition of cationic species as regulating agents. Within this thesis,one of the few known examples of receptors with distal regulation for dicarboxylic acids has also been developed.