Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and anti-inflammatory agents. Its structure supports metal chelation, making it useful in catalysis and in the design of enzyme inhibitors. Also investigated for its potential in medicinal chemistry for targeting central nervous system disorders due to its isoquinoline core, which can cross the blood-brain barrier. Additionally, it serves as a building block in the preparation of fluorescent probes and bioactive molecules in research settings.