Used as a chiral organocatalyst in asymmetric synthesis, particularly in enantioselective cyclization and conjugate addition reactions. Its rigid bicyclic structure and positive charge enhance its ability to activate substrates through ion pairing, enabling high stereocontrol. Commonly applied in the synthesis of biologically active compounds, including pharmaceutical intermediates, where precise stereochemistry is critical. The tetrafluoroborate salt improves solubility and stability in organic solvents, making it suitable for use under mild reaction conditions.