Used as a chiral organocatalyst in asymmetric synthesis, particularly in enantioselective transformations such as Diels-Alder reactions, Michael additions, and aldol reactions. Its rigid, well-defined stereochemistry enhances selectivity, making it valuable in pharmaceutical and fine chemical synthesis where high enantiomeric purity is required. The tetrafluoroborate salt improves stability and solubility in organic solvents, facilitating its use in various reaction conditions.