Used as a highly effective reagent for introducing the 9-fluorenylmethoxycarbonyl (Fmoc) protecting group in peptide synthesis. It enables selective protection of primary amines under mild conditions, ensuring high yields and minimal side reactions. Its high reactivity allows for efficient coupling in solid-phase peptide synthesis, making it valuable in the production of complex peptides and proteins. Also employed in the synthesis of amino acid derivatives and other amine-containing compounds where precise protection is required.