Used primarily in peptide synthesis as a chiral building block, this compound serves as a protected amino acid derivative featuring a chlorine substituent. The Fmoc group enables orthogonal protection of the amine functionality, making it compatible with solid-phase peptide synthesis under mild basic conditions. The chlorine atom allows for further functionalization or cyclization reactions, enabling the construction of constrained peptides or peptidomimetics. Its stereochemistry is critical for inducing specific conformational properties in the target molecule, which is valuable in medicinal chemistry for developing bioactive peptides with enhanced stability and selectivity.