Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of peptide-based drugs. Its protected amine and carboxylic acid functionalities make it suitable for solid-phase peptide synthesis and solution-phase coupling reactions. The methoxy group enhances solubility and influences the electronic properties of the molecule, aiding in the modulation of reactivity during synthesis. Commonly employed in the preparation of enzyme inhibitors and bioactive molecules where stereochemistry plays a critical role in activity.