Used in pharmaceutical research as a key intermediate in the synthesis of biologically active compounds, particularly in the development of kinase inhibitors and central nervous system agents. Its structure allows for selective modification, making it valuable in creating potent and selective drug candidates. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to enhance binding affinity and metabolic stability. Also utilized in the preparation of fluorescent probes and receptor ligands for biochemical assays.