Chelated Bisphosphites with a Calix[4]arene Backbone: New Ligands for Rhodium-Catalyzed Low-Pressure Hydroformylation with Controlled Regioselectivity
摘要:
Extremely high regioselectivities were achieved in the rhodium-catalyzed low-pressure hydroformylation of 1-octene to n-nonanal with chelate bisphosphites that contain a p-tert-butylcalix[4]arene backbone (shown in the picture). It was possible to tailor the structures and ultimately the catalytic properties of these complexes using molecular modeling calculations.
2,4,6-Tris(2,6-di-tert-butyl-4-substituted-phenoxy)-1,3,5,2,4,6-trioxatriphosphorinanes. Synthesis, characterization, x-ray structure, and solid-state phosphorus-31 NMR of a novel family of phosphorus(III)-oxygen heterocycles
作者:D. W. Chasar、J. P. Fackler、A. M. Mazany、R. A. Komoroski、W. J. Kroenke