Pyboxes are a direct evolution of box ligands and take advantage from the C2-symmetry to reduce the number of possible configurations of the reacting complex formed from ligand, Lewis acid (a cation), and one of the reagents involved in the reaction. A comparison of complexed box and pybox showed that the binding site of pybox is suitable to host Ln cations that become the Lewis acids of election in pybox-based chiral catalysts, in contrast to the failure of Ln-box complexes. It also increased rigidity of the pybox scaffold when the ligand behaves as tridentate, rigidity that is further increased in the reacting complex with reagents behaving as bidentate.

Pyridine-2,6-bis(oxazolines), Helpful Ligands for Asymmetric Catalysts

DESIMONI, GIOVANNI;FAITA, GIUSEPPE;QUADRELLI, PAOLO
2003-01-01

Abstract

Pyboxes are a direct evolution of box ligands and take advantage from the C2-symmetry to reduce the number of possible configurations of the reacting complex formed from ligand, Lewis acid (a cation), and one of the reagents involved in the reaction. A comparison of complexed box and pybox showed that the binding site of pybox is suitable to host Ln cations that become the Lewis acids of election in pybox-based chiral catalysts, in contrast to the failure of Ln-box complexes. It also increased rigidity of the pybox scaffold when the ligand behaves as tridentate, rigidity that is further increased in the reacting complex with reagents behaving as bidentate.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/133112
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