L-Aspartic acid β-benzyl ester is widely used in peptide synthesis as a protecting group for the carboxyl function of aspartic acid. This esterification helps prevent unwanted side reactions during the formation of peptide bonds, ensuring the integrity of the peptide chain. It is particularly valuable in solid-phase peptide synthesis, where selective deprotection and coupling steps are critical. Additionally, it serves as an intermediate in the production of various bioactive compounds and pharmaceuticals, contributing to the development of drugs targeting neurological and metabolic disorders. Its stability and ease of removal under mild conditions make it a preferred choice in organic and medicinal chemistry research.