Used as an intermediate in pharmaceutical synthesis, particularly in the development of active pharmaceutical ingredients (APIs) that require piperazine moieties. Its structure allows for easy incorporation into complex molecules, making it valuable in the production of drugs targeting central nervous system disorders, antimicrobials, and antihistamines. The tert-butyl ester serves as a protecting group for the carboxylic acid, providing stability and selectivity during multi-step organic transformations, while the hydrochloride salt enhances solubility in polar solvents and facilitates handling. Commonly employed in medicinal chemistry research and development for constructing drug-like molecules with improved pharmacokinetic properties.