Diethyl 3-oxopimelate is widely utilized in organic synthesis as a versatile building block for the preparation of various complex molecules. Its application is particularly notable in the synthesis of pharmaceuticals, where it serves as an intermediate in the production of active pharmaceutical ingredients (APIs). The compound is also employed in the development of fine chemicals and specialty materials, contributing to the creation of polymers, resins, and other advanced materials. Additionally, its role in the synthesis of heterocyclic compounds makes it valuable in medicinal chemistry for designing new drug candidates. Its reactivity and structural features enable its use in multi-step synthetic routes, often involving condensation, cyclization, or functional group transformations.