tert-Butyl ((3R,4R)-4-hydroxypyrrolidin-3-yl)carbamate hydrochloride is primarily used in pharmaceutical research and development, particularly in the synthesis of chiral intermediates for drug candidates. Its structure, featuring a hydroxyl group and a carbamate moiety, makes it a valuable building block for creating biologically active molecules, especially in the development of enzyme inhibitors and receptor modulators. The compound is often employed in the preparation of compounds targeting neurological disorders, such as Parkinson's disease or Alzheimer's disease, due to its ability to interact with specific biological pathways. Additionally, its chiral nature allows for the production of enantiomerically pure drugs, which is critical for optimizing therapeutic efficacy and reducing side effects. The hydrochloride salt form enhances its stability and solubility, making it suitable for use in various synthetic processes and formulations.