Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification, making it valuable in medicinal chemistry for designing drugs with improved binding affinity and selectivity. Commonly employed in research settings to develop potential therapeutics targeting neurological disorders and inflammation due to its isoquinoline core, which is known for bioactivity in central nervous system applications. Also utilized in the preparation of fluorescent probes for biochemical assays, leveraging its aromatic framework for signal detection in cellular imaging.