Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical development. Its structure supports the construction of complex heterocyclic systems found in kinase inhibitors and neuroactive agents. Commonly employed in medicinal chemistry for modifying peptide-like frameworks, enhancing metabolic stability and bioavailability. Also utilized in solid-phase and solution-phase combinatorial chemistry for drug discovery due to its bifunctional reactivity—enabling coupling at both carboxylic acid and secondary amine sites after deprotection.