Used in peptide synthesis as a protecting group for amino acids, ensuring selective reactions during the formation of peptide bonds. It is particularly valuable in solid-phase peptide synthesis (SPPS) for constructing complex peptides and proteins. The Fmoc group provides stability under basic conditions and can be easily removed using piperidine, making it a versatile tool in organic and medicinal chemistry. Its application extends to the development of pharmaceuticals, bioactive peptides, and research in biochemistry.