Fmoc-Phe-OSu is widely used in peptide synthesis as a protecting group for amino acids. It is particularly valuable in solid-phase peptide synthesis (SPPS) due to its ability to protect the amino group of phenylalanine during the coupling process. The Fmoc group can be easily removed under mild basic conditions, allowing for the sequential addition of amino acids to build peptides. This compound is essential in the production of custom peptides for research, drug development, and biochemical studies. Its stability and efficiency make it a preferred choice in laboratories focused on peptide chemistry.