Boc-Leu-Met-OH is primarily used in peptide synthesis as a protected dipeptide building block. The Boc (tert-butoxycarbonyl) group serves as a protective group for the amino function, ensuring selective reactions during peptide chain elongation. This compound is particularly valuable in solid-phase peptide synthesis (SPPS) and solution-phase synthesis, where it helps in constructing larger peptide sequences with precise control over amino acid incorporation. Its application is common in the development of bioactive peptides, pharmaceuticals, and research tools for studying protein structure and function. The leucine and methionine residues in this dipeptide contribute to hydrophobic interactions and sulfur-containing functionalities, which are often critical in peptide stability and biological activity.