tert-Butyl 3-aminopropanoate is used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. It features a free primary amine and a tert-butyl ester, providing versatile reactivity for constructing more complex molecules. The unprotected amine enables nucleophilic reactions, while the tert-butyl ester acts as a protecting group for the carboxylic acid, which can be selectively deprotected under acidic conditions without affecting other functionalities. Commonly employed in the synthesis of beta-amino acid derivatives and bioactive compounds. Additionally, the tert-butyl group enhances metabolic stability and lipophilicity, making it valuable in prodrug development.