Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for building complex heterocyclic systems. Commonly employed in solid-phase and solution-phase peptide-like synthesis due to the presence of both carboxylic acid and protected nitrogen functionalities. The Boc-protected isoindoline core is also utilized in the preparation of proteolysis targeting chimeras (PROTACs) and other targeted degradation agents.