Used as an intermediate in pharmaceutical synthesis, particularly in the development of bioactive molecules and drug candidates. The aldehyde group enables further functionalization through reactions such as reductive amination or Wittig transformations, allowing for the introduction of extended aromatic or alkenyl systems. The tert-butoxycarbonyl (Boc) protected amine provides a handle for peptide coupling or deprotection strategies in multi-step syntheses. Its cyclopropyl core contributes conformational rigidity, which is valuable in medicinal chemistry for modulating metabolic stability and target binding affinity. Commonly employed in the preparation of protease inhibitors and receptor modulators.