(R)-5-Methyl-3-morpholinone is primarily used in the synthesis of pharmaceuticals, particularly in the development of chiral compounds. Its structure makes it a valuable intermediate in the production of active pharmaceutical ingredients (APIs) that require specific stereochemistry for efficacy. It is also employed in organic synthesis to create complex molecules with potential therapeutic applications, including antibiotics and central nervous system (CNS) drugs. Additionally, it serves as a building block in the preparation of agrochemicals, contributing to the development of pesticides and herbicides with enhanced activity and selectivity.