Fmoc-Tyr(Bzl)-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid building block, where the Fmoc group safeguards the amino group during the synthesis process, and the Bzl (benzyl) group protects the hydroxyl group of tyrosine. This compound is essential for constructing peptides with specific sequences, ensuring that the tyrosine residue remains intact and functional until the final deprotection step. It is commonly employed in the production of peptides for research, pharmaceuticals, and biotechnology applications, including the development of therapeutic peptides, vaccines, and diagnostic tools. Its stability and compatibility with SPPS protocols make it a valuable reagent in peptide chemistry.