Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs) that require piperazine-based structures. Its functional groups allow for selective modifications, making it valuable in creating drug candidates for neurological and psychiatric disorders. Commonly employed in peptide coupling and solid-phase synthesis due to the presence of the carboxylic acid group and the protected amine. The Boc-protected piperazine enables controlled deprotection and coupling steps in multi-step organic syntheses, especially in the production of kinase inhibitors and receptor antagonists.