A new methodology for the asymmetric synthesis of quaternary alpha-substituted amino acids using memory of chirality has been developed. The strategy utilizes the dynamic axial chirality of tertiary aromatic amides to memorize the initial chirality of an alpha-amino acid during an enolization step. Starting from five different l-amino acids, the corresponding oxazolidin-5-ones containing a tertiary
We describe here an asymmetric aldol reaction based on the principle of Memory of Chirality. From α-aminoacids such as leucine and methionine, we have synthesized in two steps quaternary α-aminoacid derivatives with high diastereoselectivity and enantioselectivity, using the chirality of the initial α-aminoacid as the only chirality source. Furthermore, we were able to determine the relative and