This compound is widely used in peptide synthesis as a protecting group for thiazolidine-4-carboxylic acid. Its primary application lies in the field of organic chemistry, particularly in the synthesis of complex peptides and proteins. The (9H-fluoren-9-yl)methoxycarbonyl (Fmoc) group is a key feature, providing stability during the synthesis process while allowing for selective deprotection under mild conditions. This makes it highly valuable in solid-phase peptide synthesis (SPPS), where it helps in the stepwise construction of peptide chains. Additionally, its chiral nature ensures the preservation of stereochemistry, which is crucial for producing biologically active peptides. The compound is also utilized in the development of pharmaceutical intermediates and in research focused on peptide-based drug discovery.