Used as a key chiral intermediate in the synthesis of pharmaceutical agents, particularly in the production of protease inhibitors. Its stereochemistry enables selective reactions critical for creating biologically active molecules. Commonly employed in the development of antiviral drugs, including those targeting HIV and hepatitis C virus. The tert-butyl carbamate group serves as a protected amine, allowing controlled deprotection during multi-step syntheses. Its chloro and hydroxyl functional groups provide sites for further chemical modification, making it valuable in medicinal chemistry for building complex drug scaffolds.