Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where protection of the piperidine nitrogen is required. The Cbz group allows for selective reactivity at the carbonyl chloride site, enabling peptide coupling or amide bond formation under controlled conditions. Commonly applied in medicinal chemistry for constructing complex molecules, including protease inhibitors and receptor agonists/antagonists. Its reactivity makes it suitable for use in both solution-phase and solid-phase synthesis. Handling requires care due to moisture sensitivity and potential for side reactions with protic functional groups.