A Highly Active Hydroformylation Catalyst Using a Self‐Assembling Bis‐N‐Pyrrolyl Phosphine Ligand

Abstract

AbstractHerein we report an improved self‐assembling phosphorus ligand based on hydrogen bonding between pyridone/hydroxypyridine in the ligand backbone. The N‐pyrrolyl substituents significantly improve the π‐backbonding properties of the ligand. Rhodium, iridium and platinum complexes of the ligand were prepared and analyzed by NMR spectroscopy and x‐ray crystal structure analysis. A catalyst based on this ligand showed very high catalytic activity and linear regioselectivity in rhodium‐catalyzed hydroformylation of 1‐octene. The same ligand was applied in linear regioselective iridium‐catalyzed hydroformylation of 1‐octene.