Used in peptide synthesis and pharmaceutical research as a protected tyrosine derivative. The Boc group provides temporary protection of the amino function, while the propynyl group protects the phenolic hydroxyl, allowing selective reactions at other sites in the molecule. Commonly employed in the solid-phase synthesis of complex peptides and bioactive compounds where orthogonal protection strategies are required. Its alkyne functionality also enables use in click chemistry reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC), facilitating bioconjugation and labeling applications in drug development and biochemical studies.