Used in organic synthesis as an intermediate for pharmaceuticals and functional materials, particularly in cross-coupling reactions such as Suzuki and Heck reactions to build complex heterocyclic systems. Serves as a key building block in the development of bioactive molecules, including potential anticancer and antimicrobial agents. Its iodine substituent allows for easy functionalization, making it valuable in medicinal chemistry research and the design of isoquinoline-based drugs. Also applied in materials science for synthesizing nitrogen-containing aromatic compounds used in optoelectronic devices.