Used in bioconjugation and drug delivery systems, it serves as a linker to attach bioactive molecules to polymers or nanoparticles. The Boc group provides protection for the amine during synthesis, while the Tos group allows for selective deprotection and further functionalization. It is particularly valuable in creating PEGylated compounds, enhancing solubility, stability, and biocompatibility of therapeutic agents. Commonly applied in the development of targeted cancer therapies, peptide modifications, and antibody-drug conjugates. Its versatility makes it a key reagent in medicinal chemistry and biopharmaceutical research.