Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its structure supports the design of bioactive molecules due to the presence of both amino and carbonyl functional groups, which facilitate binding to enzyme active sites. Also employed in the preparation of fluorescent probes and dyes, where its isoindolinone core contributes to photostability and emission properties. Additionally, it serves in research settings for building complex heterocyclic compounds in medicinal chemistry.