Used as a chiral building block in pharmaceutical synthesis, particularly in the development of bioactive molecules and drug candidates. Its hydroxyl and amine functional groups allow for versatile chemical modifications, making it valuable in creating structurally complex compounds. Commonly employed in the preparation of protease inhibitors, receptor agonists, and antagonists, especially in central nervous system and metabolic disorder therapies. The hydrochloride salt form enhances stability and solubility, facilitating handling and use in multi-step organic reactions.