Synthesis of Phosphino Oxazoline Ligand Libraries from Amino Acid and Phosphino Carboxylate Building Blocks

A modular route to new phosphine−oxazoline ligands is reported. The ability of these ligands to asymmetrically catalyze the addition of dimethyl malonate to 1,3-diphenylprop-2-enyl acetate was investigated. The best of these ligands gave a palladium complex which catalyzed the addition of dimethyl malonate to 1,3-diphenylprop-2-enyl acetate in a 99% yield and in 98% enantiomeric excess (Table 3, entry 11).