Abstract

The bispentachlorophenyl esters of monosubstituted malonic acids react with 2-aminopyridine and acid amidines under mild conditions. “Malonyl-α-aminopyridine” exists as 1c in strong acids, and 1d in less acidic and neutral media, whereas in alkaline media as 1f, an aromatic structure formed by the enolization of the second carbonyl.

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