(R)-tert-Butyl 3-cyanomorpholine-4-carboxylate is primarily used in the pharmaceutical industry as a key intermediate in the synthesis of various active pharmaceutical ingredients (APIs). Its structure makes it valuable for constructing complex molecules, particularly in the development of drugs targeting neurological and cardiovascular diseases. The compound is often employed in asymmetric synthesis, where its chiral center plays a crucial role in producing enantiomerically pure substances. Additionally, it serves as a building block in the preparation of morpholine derivatives, which are widely utilized in medicinal chemistry for their bioactivity and pharmacokinetic properties. Its application extends to research and development, where it aids in the discovery of new therapeutic agents.