Used in pharmaceutical research as a key intermediate in the synthesis of proteolysis-targeting chimeras (PROTACs). It serves as a linker component that connects a target protein binder to an E3 ubiquitin ligase recruiter, enabling targeted protein degradation. Its tert-butyloxycarbonyl (Boc) protected amine group allows for controlled deprotection and further conjugation in multi-step synthetic routes. The structure supports solubility and stability during solid-phase or solution-phase peptide-like assembly, making it valuable in developing novel therapeutics for cancer, neurodegenerative diseases, and other conditions involving dysregulated proteins.