Reaction of 2-[Aryl(alkyl)amino]malonates with Chloroethynylphosphonates

Preparative limitations of the reaction of chloroethynylphosphonates with 2-(alkylamino)malonates have been established. Unlike the reaction of chloroethynylphosphonates with 2-(arylamino)malonates which involve only the carbon nucleophilic center, 2-(alkylamino)malonates react through both carbon and nitrogen atoms. The geometric structural, energetic, and charge parameters of the optimized structures of aliphatic and aromatic diethyl 2-aminomalonates have been determined by quantum chemical calculations using Gaussian 03 software, and pKa values for both nucleophilic centers in their molecules have been calculated.