Diethyl diethylmalonate or diethyl 2,2-diethylmalonate is a derivative of diethyl malonate.It can be used in the synthesis of barbital.[1]
As being a diethyl malonate derivative, it can be combined with urea under the action of a strong base to form a barbiturate. In this case, diethyl diethylmalonate plus urea forms barbital under the action of sodium ethoxide.