Synthesis of new heteroatomic podands from ethyl 2-[(2-aminophenylamino)methylidene]-3-oxoalkanoates and thiophene-2,5-dicarboxaldehyde

Condensation of two moles of ethyl 2-[(2-aminophenylamino)methylidene]-3-oxo-3-(polyfluoroalkyl)propionates with 2,5-thiophenedicarboxaldehyde results in new heteroatomic podands. X-ray data showed that in the solid state these molecules arrange in two independent chelating fragments of β-amino enone type, thiophene fragment being a spacer.