Used as a chiral building block in the synthesis of pharmaceuticals and peptides, particularly in the development of protease inhibitors and other bioactive molecules. Its benzyl ester group acts as a protecting group for the carboxylic acid function during peptide coupling, allowing selective reaction at the amino group. The hydrochloride salt enhances stability and solubility in polar solvents, making it suitable for use in organic synthesis and medicinal chemistry. Commonly employed in the preparation of antibiotics, antivirals, and enzyme inhibitors where stereochemistry is critical for biological activity.