Used in organic synthesis as an intermediate for pharmaceuticals and agrochemicals. Serves as a building block in the preparation of nitrogen-containing heterocyclic compounds. Commonly employed in cross-coupling reactions such as Suzuki and Heck reactions to construct complex isoquinoline derivatives. Applied in research for developing bioactive molecules, including potential kinase inhibitors and central nervous system agents. Also utilized in materials science for synthesizing functional organic materials due to its aromatic and electron-rich structure.