Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and other bioactive molecules. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for constructing complex heterocyclic compounds. Commonly employed in cross-coupling reactions such as Suzuki or Buchwald-Hartwig aminations to build drug-like molecules. Also utilized in research for developing potential treatments in oncology and central nervous system disorders due to its isoquinoline core, which is known for interacting with various biological targets.