Diethylsuccinoylsuccinate is an organic compound with the formula [CH<sub>2</sub>C(OH)=C(CO<sub>2</sub>Et)]<sub>2</sub> (Et = ethyl). A tetrasubstituted derivative of 1,4-cyclohexadiene, the compound is the enol tautomer of the corresponding cyclohexanedione. It is produced by base-induced condensation of diethyl succinate:
Diethylsuccinylsuccinate is valued as a precursor to the quinacridone pigments. For example, it reacts with two equiv of anilines to give the diamines [CH<sub>2</sub>C(N(H)Ar)=C(CO<sub>2</sub>Et)]<sub>2</sub>, which undergoes cyclization upon treatment with acid to give dihydroquinacridone.
When heated in the presence of acid, diethylsuccinoylsuccinate converts to 1,4-cyclohexanedione via hydrolysis of the esters followed by decarboxylation.