Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure sulfonamides and sulfoxides. Its rigid cyclic structure and stereochemical stability make it valuable for controlling stereochemistry during carbon-carbon bond formation. Commonly employed in pharmaceutical intermediates where high enantioselectivity is required, especially in the synthesis of bioactive molecules containing sulfur functionalities. The tert-butyl carbamate protecting group allows for selective deprotection under mild acidic conditions, enabling further functionalization in multistep synthetic routes.