Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of protease inhibitors and other bioactive molecules. Its spirocyclic structure and functional groups allow for selective modifications, making it valuable in medicinal chemistry for optimizing drug potency and metabolic stability. Commonly employed in solid-phase and solution-phase peptide synthesis due to its compatibility with Boc protection strategies. Also utilized in the preparation of sulfonamide-containing heterocycles for structure-activity relationship (SAR) studies.