Used as a chiral auxiliary in asymmetric synthesis, enabling the formation of stereoselective carbon-carbon and carbon-heteroatom bonds. Its sulfoxide group coordinates with metal catalysts, directing enantioselective transformations in pharmaceutical intermediates and fine chemicals. Commonly employed in Diels-Alder, aldol, and alkylation reactions where high enantiomeric excess is required. Also serves as a building block in the synthesis of bioactive molecules due to its stability and ease of removal after reaction completion.