Cbz-L-Glutamic acid 1-benzyl ester is widely used in peptide synthesis as a protecting group for glutamic acid. It helps in preventing unwanted side reactions during the formation of peptide bonds. The compound is particularly valuable in the synthesis of complex peptides and proteins, where selective protection and deprotection of functional groups are crucial. Additionally, it finds application in the development of pharmaceuticals, especially in the production of peptide-based drugs, where it ensures the integrity and specificity of the final product. Its use in organic synthesis also extends to the preparation of intermediates for various biochemical and medicinal chemistry studies.