This compound is widely used in peptide synthesis, particularly as a building block for creating peptides with specific structural features. It is often employed in solid-phase peptide synthesis (SPPS) to introduce cyclopropylalanine residues into peptide chains, which can enhance stability and conformational rigidity. The Fmoc (fluorenylmethyloxycarbonyl) protecting group ensures selective deprotection during synthesis, allowing for precise control over the peptide assembly process. Its application is crucial in the development of bioactive peptides, pharmaceuticals, and research tools for studying protein interactions and functions.