Used in peptide synthesis as a chiral building block for developing pharmaceuticals, particularly in the construction of structurally complex molecules requiring stereochemical control. The Fmoc group allows for mild deprotection in solid-phase synthesis, making it compatible with a wide range of side-chain protecting groups. The benzyl-substituted piperidine moiety can serve as a constrained scaffold to enhance selectivity and stability in bioactive peptides. Commonly employed in the development of protease inhibitors and central nervous system agents due to the structural rigidity and lipophilicity it imparts.