Used primarily in peptide synthesis as a protected amino acid derivative, this compound enables selective coupling reactions due to the Fmoc group, which provides orthogonal protection for the amine functionality. The p-tolyl side chain adds hydrophobic character, useful in tuning peptide properties or facilitating specific interactions in solid-phase synthesis. It is especially valuable in the preparation of structured peptides and peptidomimetics where side chain aromaticity influences conformation or biological activity. Commonly employed in research settings for drug discovery and biochemical probes.