3-Aminooxetane-3-carboxylic acid is primarily utilized in the field of medicinal chemistry as a building block for the synthesis of various pharmaceutical compounds. Its unique structure, featuring an oxetane ring, enhances the metabolic stability and bioavailability of drug molecules. This compound is often incorporated into the design of protease inhibitors, which are critical in treating diseases such as HIV and hepatitis C. Additionally, it serves as a precursor in the development of novel antibiotics, helping to combat drug-resistant bacterial strains. Its application extends to the creation of peptide mimetics, which are used to mimic the structure and function of natural peptides, aiding in the discovery of new therapeutic agents.