Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. Its structure allows for selective modification in drug design, making it valuable in medicinal chemistry research. Commonly employed in the preparation of protease inhibitors and antitumor agents due to its ability to interact with specific enzyme active sites. Also utilized in the construction of complex piperazine-containing architectures found in central nervous system (CNS) active drugs.