Organocatalytic Multicomponent Synthesis of α/β‐Dipeptide Derivatives
Résumé
A straightforward multicomponent Knoevenagel‐aza‐Michael‐Cyclocondensation reaction involving readily available hydroxamic acid‐derived from naturally occurring α‐amino acids allows a diversity‐oriented synthesis of novel isoxazolidin‐5‐ones possessing an N ‐protected α‐amino acid pendant with good to high diastereoselectivities thanks to a match effect with a chiral organocatalyst. These diversely substituted heterocycles, easily isolated as a single diastereoisomer, proved to be versatile platforms for the formation of an array of α/β‐dipeptide fragments.
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