Used in pharmaceutical synthesis as a protected intermediate, particularly in the development of targeted protein degraders like PROTACs. Its structure enables conjugation to linker systems for bifunctional molecules, where the tert-butyl carbamate (Boc) group provides amine protection during multi-step reactions. The polyethylene glycol (PEG) spacer enhances solubility and flexibility, improving pharmacokinetic properties in drug candidates. Commonly applied in oncology research for constructing cereblon E3 ligase modulators linked to target-binding moieties.