Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. Its protected piperazine structure allows for selective functionalization, making it valuable in medicinal chemistry for building complex drug scaffolds. Commonly employed in solid-phase and solution-phase peptide-like synthesis due to the stability and orthogonal protection offered by the Boc groups. Also utilized in the preparation of protease inhibitors and receptor antagonists where a substituted piperazine moiety is required.