This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a building block for introducing tyrosine residues with propargyl groups into peptide chains. The propargyl group allows for further functionalization through click chemistry, such as copper-catalyzed azide-alkyne cycloaddition (CuAAC), enabling the attachment of various tags, probes, or other molecules. This makes it valuable in the development of peptide-based drugs, bioconjugation studies, and the creation of peptide-antibody conjugates. Additionally, it is employed in the synthesis of peptides for research in biochemistry, molecular biology, and drug discovery, where site-specific modifications are required.