This chemical is primarily used in organic synthesis as a versatile building block for creating complex molecules, particularly in the development of polyethylene glycol (PEG)-based compounds. Its structure, featuring both a bromo group and a tert-butyl ester, makes it suitable for coupling reactions, where it can introduce PEG chains into target molecules. This is particularly valuable in the pharmaceutical industry, where PEGylation (attaching PEG chains) is a common strategy to improve the solubility, stability, and bioavailability of drugs. Additionally, it is utilized in the preparation of functionalized polymers and surfactants, which have applications in drug delivery systems, coatings, and nanotechnology. The bromo group also allows for further chemical modifications, enabling the creation of tailored compounds for specific research or industrial needs.