Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs) with central nervous system activity. It serves as a building block in the preparation of receptor agonists and antagonists, especially in antipsychotic and antidepressant drug research. Its structure allows for easy modification of piperazine-containing molecules, enhancing drug solubility and bioavailability. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to the presence of a functional ester and a methylpiperazine group, enabling diverse derivatization. Also utilized in the production of small molecule kinase inhibitors and other targeted therapies in oncology research.