Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure compounds. Its rigid cyclic structure and stereochemical stability make it valuable for controlling stereochemistry during carbon-carbon bond formation. Commonly employed in aldol reactions and alkylations where high diastereoselectivity is required. After serving its purpose, it can be cleaved under mild conditions without racemization, making it ideal for multi-step synthesis of pharmaceuticals and natural products.