Used in peptide synthesis, particularly in the preparation of complex bioactive peptides where stereochemical control is critical. The Fmoc group provides orthogonal protection for the amine functionality, allowing stepwise assembly of peptides using solid-phase or solution-phase methods. The presence of the 3-hydroxy group on the phenyl ring offers a site for further modification, such as glycosylation or phosphorylation, enabling the synthesis of glycopeptides or enzyme substrates. Its D-configuration makes it valuable in designing metabolically stable peptides, often used in medicinal chemistry for developing protease-resistant analogs or peptidomimetics. Commonly employed in research related to drug discovery, especially for targets involving peptide hormones or signaling molecules.