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 group allows for easy introduction and removal under mild conditions, enhancing its utility in multi-step synthetic routes.