Used in peptide synthesis as a protected form of aspartic acid, ensuring selective reactions at desired sites. The Boc group protects the amino functionality, while the tert-butyl ester shields the carboxyl group, preventing unwanted side reactions. The dicyclohexylammonium salt form enhances solubility in organic solvents, facilitating handling during synthesis. Commonly employed in the production of complex peptides and proteins, particularly in pharmaceutical research for developing therapeutic agents. Its stability and compatibility with various reagents make it a valuable intermediate in solid-phase peptide synthesis.