Metallkomplexe mit biologisch wichtigen Liganden,XLV. Palladium(II)-Komplexe mit Dehydro-α-amino- und 2-Iminosäureestern als Liganden

Metal Complexes with Biologically Important Ligands, XLV. — Palladium (II) Complexes of Dehydro-α-amino and 2-Imino Acid Esters as Ligands The preparation and spectroscopic data of the complexes ( 1 ) and ( 6 ) and of [(OC)₅Re H₂NC(CO₂Me)CH(Ph)]⁺ BF ( 2 ) are reported. The reactions of dehydroamino acid esters R(ROC)-CC(CO₂R)NH₂ with Na₂PdCl₄ give 1-imino-3-ketonato chelate complexes ( 3 ), of which one resentative ( 3b ) has been characterized by X-ray structure analysis. For comparison the structure of the dehydroamino acid derivative OC(Me)C(CO₂Et)C(CO₂Et)NH₂ ( 4 ) has also been determined. Palladium(II) binds the anion of dehydroarmentomycin via the N,O atoms ( 8 ). This coordination is also found with (η⁵-C₅H₅)(OC)₂Mo and allylglycinate ( 9 ).