Z-D-Thr-OMe is primarily used in peptide synthesis as a protected form of threonine. It serves as a building block in the creation of complex peptides, where the Z group (benzyloxycarbonyl) protects the amino group during the synthesis process, and the methyl ester (OMe) protects the carboxyl group. This protection ensures that reactions occur selectively at desired sites, preventing unwanted side reactions. It is particularly valuable in the synthesis of peptides with specific stereochemistry, as the D-threonine configuration is crucial for certain biological activities. Additionally, it finds application in research and development of pharmaceuticals, especially in the design of peptide-based drugs or bioactive molecules. Its use is essential in organic chemistry laboratories focused on peptide and protein engineering.