Used in organic synthesis as an intermediate for pharmaceuticals, particularly in the development of isoquinoline-based bioactive compounds. Its bromo and ester functional groups allow for cross-coupling reactions and nucleophilic substitutions, making it valuable in constructing complex heterocyclic systems. Commonly employed in medicinal chemistry for the preparation of potential anticancer, antimicrobial, and central nervous system agents. Also utilized in research settings to develop novel kinase inhibitors and receptor ligands due to the isoquinoline scaffold’s affinity for biological targets.