Diethyl isopropylidenesuccinate is primarily used as an intermediate in organic synthesis, particularly in the production of fine chemicals and pharmaceuticals. Its structure allows it to participate in various chemical reactions, making it valuable for constructing complex molecules. It is often employed in the synthesis of active pharmaceutical ingredients (APIs) where specific functional groups are required. Additionally, it serves as a precursor in the development of agrochemicals, contributing to the creation of compounds with pesticidal or herbicidal properties. Its versatility also extends to the field of material science, where it can be utilized in the preparation of specialized polymers or coatings with tailored properties.