Used in organic synthesis as an intermediate for pharmaceuticals and functional materials. Serves as a building block in the preparation of bioactive compounds and heterocyclic derivatives. Commonly employed in cross-coupling reactions such as Suzuki and Heck reactions to construct complex isoquinoline-based structures. Applied in research for developing potential therapeutic agents, including kinase inhibitors and antimicrobial compounds. Also utilized in the synthesis of luminescent materials and organic semiconductors due to its aromatic and electron-deficient character.