Used in organic synthesis as a building block for pharmaceuticals and agrochemicals, particularly in Suzuki-Miyaura cross-coupling reactions to form carbon-carbon bonds. Its boronic acid group enables efficient coupling with aryl halides, making it valuable in the development of complex heterocyclic compounds. Commonly applied in medicinal chemistry for constructing isoquinoline-based drug candidates, including those targeting kinase inhibition and central nervous system disorders. Also utilized in materials science for designing fluorescent probes and organic electronic materials due to the rigid isoquinoline scaffold.