Used in solid-phase peptide synthesis as a protected amino acid derivative, enabling selective incorporation of tyrosine residues into peptide chains. The Fmoc group allows for mild base deprotection, compatible with a wide range of side-chain protecting groups. The 2,6-dichlorobenzyl (2,6-Cl2-Bzl) protection on the phenolic hydroxyl group provides enhanced stability during synthesis and resists premature deprotection under basic conditions. This compound is particularly valuable in the preparation of complex peptides and proteins requiring precise tyrosine modification, including therapeutic peptides and enzyme substrates. Its stability and orthogonal protection make it suitable for automated peptide synthesizers and high-throughput applications.