Used in peptide synthesis as a chiral building block for constructing structurally complex peptides with defined stereochemistry. The Fmoc group enables solid-phase peptide synthesis by providing orthogonal protection for the amine functionality, allowing stepwise assembly of peptide chains. The 4-methoxyphenyl side chain imparts hydrophobic character and can influence peptide conformation or receptor binding in bioactive peptides. Commonly employed in the development of pharmaceuticals and enzyme inhibitors where stereochemistry and aromatic interactions are critical for activity.