Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase 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-like synthesis due to its compatibility with protecting group strategies. Also utilized in research settings to construct complex heterocyclic systems for structure-activity relationship studies.