Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its protected piperazine structure allows for selective functionalization, making it valuable in drug discovery for central nervous system agents, kinase inhibitors, and other bioactive molecules. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to the stability and modifiability of the piperazine core.