Used as an intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research. It plays a key role in the development of kinase inhibitors and other targeted therapies due to the presence of reactive functional groups that allow for further chemical modifications. The tert-butyl ester group protects the carboxylic acid during synthesis, enabling selective deprotection and coupling in multi-step reactions. Its sulfonyl and piperazine moieties are commonly found in drug candidates targeting neurological disorders, inflammation, and cancer. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies.