Used as a key intermediate in the synthesis of pharmaceutical agents, particularly in the development of kinase inhibitors and other bioactive molecules. Its spirocyclic structure provides conformational rigidity, enhancing selectivity and metabolic stability in drug candidates. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies, especially in central nervous system (CNS)-targeted therapies and anti-inflammatory agents. The tert-butoxycarbonyl (Boc) group allows for easy protection and deprotection during peptide-like coupling reactions, making it valuable in multi-step organic synthesis.