Used as a key chiral intermediate in the synthesis of active pharmaceutical ingredients, particularly in the development of central nervous system (CNS) drugs and antipsychotic medications. Its piperazine backbone and hydroxyl functionality allow for selective modifications, enhancing drug solubility and receptor binding. Commonly employed in the preparation of serotonin and dopamine receptor modulators. Also utilized in the design of protease inhibitors due to its conformational stability and biocompatibility. Widely applied in medicinal chemistry for structure-activity relationship (SAR) studies.