Used as a key chiral intermediate in the synthesis of pharmaceutical agents, particularly in the development of proteolysis-targeting chimeras (PROTACs). Its structural features allow for efficient conjugation to E3 ligase ligands, enabling targeted protein degradation. The methylsulfonyl group enhances binding selectivity, while the Boc-protected amine facilitates further functionalization. Commonly employed in medicinal chemistry for optimizing linker regions in bifunctional molecules, contributing to improved pharmacokinetic properties and degradation efficiency of target proteins.