Used primarily in peptide synthesis as a protected amino acid building block, this compound enables the incorporation of constrained cyclopropane-containing amino acid derivatives into peptide chains. The Fmoc group provides orthogonal protection, allowing selective deprotection under mild basic conditions while maintaining stability during solid-phase synthesis. Its rigid cyclopropyl structure influences peptide conformation, making it valuable in the design of peptidomimetics and bioactive molecules with enhanced metabolic stability and receptor selectivity. Commonly applied in medicinal chemistry for developing enzyme inhibitors and receptor modulators.