Proline-Based P,O Ligand/Iridium Complexes as Highly Selective Catalysts: Asymmetric Hydrogenation of Trisubstituted Alkenes
作者:Denise Rageot、David H. Woodmansee、Benoît Pugin、Andreas Pfaltz
DOI:10.1002/anie.201104105
日期:2011.10.4
O joins the mix: P,O ligands (L1) form efficient iridiumcatalysts for the asymmetric hydrogenation of olefins. The proline‐derived ligands lead to high enantioselectivities with several classes of alkenes, most notably with α,β‐unsaturated carboxylic esters and ketones, where they match or even surpass the ee values reported for the best N,P and C,N ligands.