Used as an intermediate in pharmaceutical synthesis, particularly in the development of bioactive molecules and drug candidates. Its spirocyclic structure and functional groups make it valuable for constructing complex heterocyclic compounds. Commonly employed in medicinal chemistry for modifying peptide-like structures or creating constrained analogs to improve metabolic stability and receptor selectivity. Also utilized in the preparation of protease inhibitors and other enzyme-targeted therapeutics. Suitable for solid-phase and solution-phase synthesis due to the presence of a protecting group (tert-butyl carbamate equivalent), allowing stepwise assembly of multi-step synthetic pathways.