Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and other biologically active compounds. Its structure supports the formation of complex heterocyclic systems important in medicinal chemistry. Commonly employed in research settings for constructing isoquinoline-based scaffolds, which show potential in anticancer, anti-inflammatory, and neuroprotective applications. Also utilized in organic synthesis to build nitrogen-containing rings through cyclization and substitution reactions.