Widely used in peptide synthesis, this compound serves as a protected amino acid derivative, specifically for introducing tyrosine-like structures with enhanced solubility. The sulfonate group improves water solubility, making it valuable in solution-phase peptide coupling where polar intermediates are needed. It is especially useful in solid-phase synthesis when working with Fmoc-strategy, allowing mild deprotection conditions while maintaining side-chain protection. Its fluorescent properties, inherited from the fluorenyl group, enable detection during chromatography or purification steps. Commonly applied in the preparation of bioactive peptides, protein mimetics, and labeled peptides for biochemical assays.