Fmoc-β-cyclopropyl-L-Alanine is widely used in peptide synthesis as a building block for introducing cyclopropyl groups into peptide chains. Its Fmoc protecting group allows for efficient deprotection during solid-phase peptide synthesis, making it valuable in the development of peptide-based drugs and bioactive compounds. The cyclopropyl moiety enhances the rigidity and stability of peptides, which can improve their binding affinity and selectivity toward target proteins. This chemical is particularly useful in the design of enzyme inhibitors, receptor modulators, and other therapeutic peptides, where structural constraints are critical for activity. Additionally, it finds applications in research focused on studying peptide conformation and structure-activity relationships.