This compound is widely used in bioconjugation and click chemistry applications. It serves as a linker for attaching functional groups or molecules to proteins, peptides, or other biomolecules. The Boc group provides protection for the amine during synthesis, while the azide group enables efficient reactions with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC). The PEG4 spacer enhances solubility and flexibility, making it ideal for creating stable and biocompatible conjugates. It is particularly valuable in drug delivery systems, surface modification, and the development of targeted therapeutics.