D-Cyclopropylalanine is primarily used in the field of medicinal chemistry and drug development. It serves as a key building block in the synthesis of peptides and peptidomimetics, which are crucial for designing drugs targeting various diseases. Its unique cyclopropyl structure enhances the stability and bioavailability of these compounds, making it valuable in creating inhibitors for enzymes or receptors involved in conditions like cancer, viral infections, and neurological disorders. Additionally, it is utilized in research to study protein-protein interactions and to develop novel therapeutic agents with improved pharmacological properties.