Used primarily as a building block in organic synthesis, especially in the preparation of pharmaceuticals and bioactive molecules. Its alkyne group enables click chemistry reactions, such as copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in drug discovery, bioconjugation, and labeling of biomolecules. The Cbz (carbobenzyloxy) group serves as a protected amine, allowing selective deprotection under mild conditions, which is advantageous in multi-step peptide and complex molecule synthesis. Widely applied in medicinal chemistry for constructing nitrogen-containing heterocycles and propargylamine-based inhibitors.