Palladium‐Catalyzed Asymmetric Allylic Alkylation of 4‐Substituted Isoxazolidin‐5‐ones: Straightforward Access to β²,²‐Amino Acids

We report here an unprecedented and highly enantioselective palladium‐catalyzed allylic alkylation applied to 4‐substituted isoxazolidin‐5‐ones. Ultimately, the process provides a straightforward access to β 2,2 ‐amino acids bearing an all‐carbon quaternary stereogenic center in great yields and a high degree of enantioselectivity.