The utility of a novel class of P,N-ligands incorporating a chiral sulfinyl imine moiety is demonstrated in the iridium-catalyzed hydrogenation of both functionalized and unfunctionalized olefins, in which enantioselectivities of up to 94% are achieved. The modularity of the P,N-sulfinyl ligand class is highlighted by the facile preparation of a variety of sterically and electronically different ligands. Interesting structure-activity data for both the phosphine and sulfinamide components is provided by this expanded ligand set.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/15058921