Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. Its spirocyclic structure and protected functional groups make it valuable in medicinal chemistry for building complex heterocyclic systems. The compound is especially useful in solid-phase and solution-phase peptide-like synthesis due to its stability and selective deprotection characteristics. It also serves in combinatorial chemistry for generating diverse compound libraries aimed at drug discovery.