Small Bite-Angle P–OP Ligands for Asymmetric Hydroformylation and Hydrogenation

A series of small bite-angle phosphine-phosphite (P–OP) ligands have been synthesized by a two-step method. The key intermediate was prepared by an unprecedented asymmetric carbonyl reduction of a phosphamide using the CBS (Corey–Bakshi–Shibata) catalyst. The topology of these ligands (a configurati...

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Bibliographic Details
Published in:Organic letters 2013-07, Vol.15 (14), p.3634-3637
Main Authors: Fernández-Pérez, Héctor, Benet-Buchholz, J, Vidal-Ferran, Anton
Format: Article
Language:English
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Summary:A series of small bite-angle phosphine-phosphite (P–OP) ligands have been synthesized by a two-step method. The key intermediate was prepared by an unprecedented asymmetric carbonyl reduction of a phosphamide using the CBS (Corey–Bakshi–Shibata) catalyst. The topology of these ligands (a configurationally stable stereogenic carbon with two heteroatom substituents) and their small bite-angle (created by the close proximity of the two ligating groups to the metal center) together provide a rigid asymmetric environment around this center, enabling high stereoselectivity in hydroformylations and hydrogenations of standard substrates.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol401494x