Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS), where it serves as a protected form of aspartic acid. The Fmoc group provides temporary protection for the amino group, while the allyl ester protects the carboxylic acid side chain, allowing selective deprotection during the synthesis process. This compound is essential for constructing peptides with precise sequences, especially in the production of pharmaceuticals, bioactive peptides, and research applications. Its role in enabling controlled and efficient peptide assembly makes it a valuable tool in medicinal chemistry and biochemistry.