Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. Its structure allows for selective functionalization, making it valuable in multi-step syntheses where protection of functional groups is required. Commonly employed in the development of active pharmaceutical ingredients (APIs) due to the stability and reactivity of the Boc-protected moiety. Also utilized in the synthesis of cyclic compounds and peptidomimetics, where controlled ring formation and stereochemistry are important.