Used as an intermediate in pharmaceutical synthesis, particularly in the preparation of biologically active compounds such as proteolysis-targeting chimeras (PROTACs). Its structure allows for the incorporation of E3 ligase ligands, enabling targeted protein degradation. Commonly employed in medicinal chemistry for constructing bifunctional molecules that link a target protein binder to an E3 ubiquitin ligase recruiter. Also utilized in research settings for developing novel therapeutics in oncology and neurodegenerative diseases.