Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and antimicrobial agents. Its fluorinated structure enhances binding affinity and metabolic stability in drug candidates. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to modulate biological activity. Also utilized in the preparation of fluorescent probes and imaging agents owing to the inherent photophysical properties of the isoquinoline core. Plays a role in the design of targeted therapies for cancer and inflammatory diseases.