Used in peptide synthesis as a protected amino acid derivative, particularly in the preparation of complex biomolecules where selective deprotection is required. The acetyl group on the hydroxyl side chain prevents unwanted side reactions during coupling steps, making it valuable in solid-phase peptide synthesis. It is also employed in research settings for studying enzyme substrates and metabolic pathways involving threonine modifications. Its stability under various reaction conditions allows for high yields in multi-step organic syntheses.