Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and bioactive molecules. Its structure allows for selective functionalization, making it valuable in constructing nitrogen-containing heterocycles and amino acid derivatives. The phthalimido group acts as a protected amine, enabling controlled deprotection in multi-step syntheses. Commonly employed in the development of kinase inhibitors and other medicinal agents where precise molecular architecture is required. Also utilized in the synthesis of fluorescent probes and labeled compounds due to its reactivity with nucleophiles and compatibility with various coupling reactions.