Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and anticancer agents. Its structure allows for selective modification, making it valuable in medicinal chemistry for designing drugs that target specific cellular pathways. Also employed in research settings to develop novel isoquinoline-based molecules with potential biological activity, including antimicrobial and anti-inflammatory properties. Commonly utilized in cross-coupling reactions such as Suzuki or Buchwald-Hartwig to build complex heterocyclic systems for drug discovery.