Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure compounds. Its rigid cyclopropane and imidazolidinone framework supports stereocontrol during key bond-forming reactions. Commonly employed in pharmaceutical intermediates synthesis where high enantioselectivity is required. The xanthene moiety enhances solubility and aids in purification via chromatography or crystallization. Stable under a variety of reaction conditions, it is often used in multi-step sequences involving acylations, alkylations, and Michael additions. After serving its purpose, it can be cleaved under mild acidic or oxidative conditions to release the desired chiral product without racemization.