Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of bioactive molecules with central nervous system activity. Its spirocyclic structure and protected functional groups make it valuable in medicinal chemistry for constructing complex heterocycles. Commonly employed in the preparation of kinase inhibitors and receptor modulators due to its ability to mimic peptide-like frameworks while offering improved metabolic stability. Also utilized in solid-phase synthesis and combinatorial chemistry for generating diverse compound libraries.