Br-PEG3-C2-Boc is widely used in organic synthesis and bioconjugation processes. Its primary application is as a versatile building block for the creation of complex molecules, particularly in peptide synthesis and drug development. The compound’s bromo group allows for efficient coupling reactions, while the Boc (tert-butoxycarbonyl) group serves as a protective group for amines, enabling selective deprotection during multi-step syntheses. The PEG (polyethylene glycol) spacer enhances solubility and biocompatibility, making it valuable in the design of drug delivery systems and bioconjugates. It is also employed in the development of linkers for antibody-drug conjugates (ADCs) and other targeted therapies, where controlled release and stability are critical. Additionally, its structure makes it suitable for modifying surfaces or materials for biomedical applications, such as functionalizing nanoparticles or scaffolds in tissue engineering.