Used as an intermediate in pharmaceutical synthesis, particularly in the development of bioactive molecules and drug candidates. Its structure allows for selective functionalization, making it valuable in constructing nitrogen-containing heterocycles. Commonly employed in cross-coupling reactions, such as Suzuki or Buchwald-Hartwig, to introduce the isoindoline scaffold into larger molecular frameworks. Also utilized in medicinal chemistry for the preparation of protease inhibitors and receptor modulators due to the stability and steric properties of the tert-butyl protecting group.