Used as a chiral auxiliary in asymmetric synthesis, particularly in the formation of carbon-carbon bonds with high stereoselectivity. It enables control of stereochemistry in aldol reactions and alkylations by temporarily binding to carbonyl compounds, directing the approach of reagents. After serving its purpose, it can be removed under mild conditions, leaving behind the desired chiral product. Its stability and ease of manipulation make it valuable in the synthesis of complex organic molecules, including pharmaceuticals and natural products.