Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of targeted drug conjugates and prodrugs. Its functional groups allow for selective coupling reactions, enabling the attachment of active pharmaceutical ingredients to targeting moieties or polymer chains. Commonly employed in solid-phase peptide synthesis and bioconjugation due to the orthogonal protection of the amine group with the Boc (tert-butoxycarbonyl) moiety. The carboxylic acid group facilitates further derivatization, such as ester or amide formation, making it valuable in medicinal chemistry for constructing complex molecules with controlled release properties.