(1S,2R)-2-((tert-Butoxycarbonyl)amino)cyclohexanecarboxylic acid is a chiral, non-natural amino acid derivative featuring a cyclohexane backbone. It is a white to off-white crystalline powder with a molecular formula of C12H21NO4. The compound contains both a protected amine (Boc group) and a carboxylic acid functional group, making it a versatile bifunctional building block. This compound is primarily employed as a key chiral intermediate in pharmaceutical research and development. Its rigid cyclohexane structure and defined stereochemistry make it valuable for constructing conformationally constrained peptide mimetics and bioactive molecules. It is specifically used in the synthesis of protease inhibitors and other drug candidates where the spatial orientation of functional groups is critical for biological activity. As a Boc-protected amino acid, it is compatible with standard peptide coupling conditions. The Boc group can be readily removed under acidic conditions to reveal the free amine for further derivatization. Its applications extend to materials science for creating chiral polymers and as a ligand precursor in asymmetric catalysis.