Used in peptide synthesis as a chiral building block, particularly in the preparation of hydroxyproline derivatives and other biologically active molecules. The compound’s hydroxyl and Fmoc-protected amino groups allow selective functionalization, making it valuable in solid-phase peptide synthesis. Its allyl ester group enables mild deprotection under neutral conditions, orthogonal to Fmoc removal, which is advantageous in multi-step syntheses. Commonly employed in the development of pharmaceuticals and bioactive peptides where stereochemistry plays a critical role in activity.