Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure compounds. Its rigid oxazolidine ring helps control stereochemistry during key bond-forming reactions, such as aldol condensations and alkylations. Commonly employed in peptide synthesis and the development of pharmaceutical intermediates where precise stereocontrol is required. The Fmoc-protected amine allows for orthogonal protection strategies in multi-step syntheses, making it valuable in solid-phase and solution-phase applications.