Used in peptide synthesis as a protected amino acid building block, Boc-Leu-OMe allows for the controlled assembly of peptides by preventing unwanted reactions at the amino group. The Boc (tert-butoxycarbonyl) group protects the amine during coupling steps and can be removed under mild acidic conditions, enabling sequential addition of amino acids. The methyl ester (OMe) serves as a temporary carboxyl group protector, useful in fragment condensation or for creating prodrugs. It is commonly employed in the preparation of biologically active peptides, pharmaceutical intermediates, and in solid-phase synthesis. Its stability and selective deprotection make it valuable in both research and industrial settings for developing peptide-based drugs.