Abstract
A general strategy for the synthesis of new chiral phosphine ligands has been discovered. A common feature of these ligands is that they contain rigid aromatic backbones which can be used to restrict conformational flexibility. The bite angle of P-M-P can be changed systematically depending on the aromatic backbone. Many asymmetric reactions can potentially be catalyzed by transition metal complexes of these ligands. Moderate selectivity has been realized in the reaction between 1,3-diphenyl-2-propenyl acetate and dimethyl malonate using palladium complexes of these ligands.
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