Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of central nervous system agents. It serves as a building block for alkaloid-like structures with potential biological activity, including antitumor, antimicrobial, and neuroactive compounds. Commonly employed in research for designing novel drug candidates due to its rigid aromatic framework and structural similarity to natural isoquinoline alkaloids. Also utilized in the preparation of chiral ligands and catalysts for asymmetric synthesis.