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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XLIV. - Platinum(II) and Palladium(II) as Amino Protecting Groups. Metal Complexes with Silyl Esters and Acid Chlorides as Ligands and Peptide Synthesis at the ComplexThe cleavage of the chelate ring of platinum(II) and palladium(II) glycinate, cis-, trans-M(NH2CH2COO)2 (M = Pt, Pd), by trialkylchlorosilanes results in the formation of the complexes cis-, trans-MCl2(NH2CH2CO2SiR3)2 (1). Treatment of 1 or of cis-, trans-MCl2(NH2CHRCO2H)2, respectively, with oxalyl chloride and DMF gives the α-amino acid chloride complexes cis-, trans-MCl2(NH2CHRCOCl)2 (2) from which - using N-(trimethylsilyl)-α-amino acid esters - a series of dipeptide complexes cis-, trans-MCl2(dipeptideOR)2 (R = H, alkyl, SiMe3) (3) has been obtained. trans-Palladium complexes of type 3 and of type cis-Pd-Cl2(HisNHCHRCO2Et) (4) are also formed form the corresponding α-amino acid complexes and α-amino acid ester with a watersoluble carbodiimide.
    Notes: Der Chelatring von Platin(II)- und Palladium(II)-glycinat, cis-, trans-M(NH2CH2COO)2 (M = Pt, Pd), läßt sich mit Trialkylchlorsilanen unter Bildung der Dichlorobis(glycin-silylester)-Komplexe, cis-, trans-MCl2(NH2CH2CO2SiR3)2 (1), öffnen. Aus 1 oder den Komplexen MCl2(NH2CHRCO2H)2 werden mit Oxalylchlorid und DMF die α-Aminosäurechlorid-Verbindungen cis-, trans-MCl2(NH2CHRCOCl)2 (2) erhalten, welche mit N-(Trimethylsilyl)-α-aminosäureestern die Dipeptid-Komplexe cis-, trans-MCl2(DipeptidOR)2 (R = H, Alkyl, SiMe2) (3) liefern. trans-Palladium-Komplexe vom Typ 3 und vom Typ cis-PdCl2(His-NHCHRCO2Et) (4) entstehen auch aus den entsprechenden α-Aminosäure-Komplexen und dem α-Aminosäureester mit einem wasserlöslichen Carbodiimid.
    Type of Medium: Electronic Resource
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