Used as a chiral auxiliary in asymmetric synthesis, enabling the selective formation of stereocenters in complex organic molecules. Its rigid structure and ability to control facial selectivity make it valuable in the preparation of enantiomerically pure pharmaceuticals and natural products. Commonly employed in alkylation, aldol, and Michael addition reactions where high enantioselectivity is required. After serving its purpose, it can be cleaved under mild conditions without racemization, preserving the stereochemical integrity of the target compound.