Used primarily in peptide synthesis, this compound acts as a protecting group for cysteine residues. It ensures the thiol group remains protected during the synthesis process, preventing unwanted side reactions. The Fmoc group can be easily removed under mild basic conditions, making it highly suitable for solid-phase peptide synthesis. It is particularly valuable in the production of complex peptides and proteins, where precise control over cysteine reactivity is essential. Additionally, it finds applications in the development of therapeutic peptides and biochemical research, where maintaining the integrity of the thiol group is critical.