Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) that require piperazine moieties. Its ester functionality allows for easy modification and coupling in multi-step organic reactions. Commonly employed in the production of central nervous system agents, including antipsychotics and antidepressants. Also utilized in the preparation of peptide-like structures and bioactive molecules where solubility and stability are enhanced by the piperazine ring. Serves as a building block in medicinal chemistry for drug discovery and optimization.