Used in the synthesis of complex organic molecules, particularly in pharmaceutical research and development. It serves as a key intermediate in the production of drug candidates, enabling the incorporation of polyethylene glycol (PEG) chains, which enhance solubility and stability of the compounds. Widely applied in bioconjugation techniques to modify peptides, proteins, and other biomolecules, improving their pharmacokinetic properties. Also utilized in the creation of crosslinkers and spacers for drug delivery systems, facilitating targeted and controlled release of therapeutic agents. Its protective Boc group allows for selective reactions in multi-step synthetic processes.