Used as an intermediate in the synthesis of pharmaceuticals and fine chemicals, particularly in the development of active pharmaceutical ingredients (APIs) where the amino and ester functionalities allow for selective reactions. The tert-butyl protecting group enhances stability during multi-step syntheses, making it valuable in peptide chemistry and the production of specialty polymers. It is also employed in the preparation of biodegradable polymers and functionalized materials due to its ability to undergo controlled hydrolysis and amidation reactions.