Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and anticancer agents. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for designing bioactive molecules. Commonly employed in cross-coupling reactions such as Suzuki-Miyaura to build complex isoquinoline derivatives with therapeutic potential. Also utilized in research for developing new central nervous system drugs due to the isoquinoline core's affinity for neurological targets.