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  • 1
    Electronic Resource
    Electronic Resource
    Catalytic Formation of Oligopeptides from α-Amino Acid Esters with (p-Cymene)ruthenium(II) Complexes (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 729-731 
    Details
    ISSN: 1434-1948
    Keywords: Catalysis ; Oligomerization ; Organometallics ; Oligopeptides ; Ruthenium complexes ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Consecutive addition of one-equivalent portions of glycine ethyl ester to [(p-cymene)Ru(GGGOMe-H+)Cl] leads to considerable amounts of (tetra- to nonapeptide)ruthenium complexes in a one-pot reaction, in which the (p-cymene)RuCl fragment acts as a catalyst. The analogous reaction with alanine methyl ester affords AGGG and AAGGG complexes as the main products. The course of these metal-catalyzed peptide oligomerizations has been followed by mass spectrometry. The synthesis and characterization of the pentapeptide complex [(C6Me6)Ru(GGGGGOMe-H+)] is reported.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden. XC. Chirale Cyclopentadienyl-Nitrosyl-Molybdän-Komplexe mit α-Aminocarboxylat-Chelat-Liganden: (η5-C5R5)(ON)(I)Mo(α-Aminocarboxylat) (R = H, Me)Professor Klaus Brodersen zum 70. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 299-303 
    Details
    ISSN: 0044-2313
    Keywords: Cyclopentadienyl nitrosyl molybdenum complexes ; α-aminocarboxylate ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes of Biologically Important Ligands. XC [1]. Chiral Cyclopentadienyl-Nitrosyl-Molybdenum Complexes of α-Amino Carboxylates: (η5-C5R5)(ON)(I)Mo(α-aminocarboxylate) (R = H, Me)The reactions of [(η5-C5H5)Mo(NO)I2]2 with glycinate, D-phenylglycinate, L-prolinate and L-azetidine-2-carboxylate give the chiral chelate complexes (η5-C5H5)(ON)(I)Mo(η-aminocarboxylate) as mixtures of isomers. The x-ray diffraction of a crystal of shows trans configuration of the amino acid and nitrosyl donors in a tetragonal pyramid.
    Notes: Die iodoverbrückten Komplexe [(η5-C5H5)Mo(NO)I2]2 setzen sich mit Glycinat, D-Phenylglycinat, L-Prolinat und L-Azetidin-2-carboxylat zu den chiralen Chelat-Komplexen (η5-C5H5)(ON)(I)Mo(α-Aminocarboxylat) um, die als Mischung von Isomeren entstehen. Die Röntgenstrukturanalyse eines Kristalls von zeigt die trans-Konfiguration der Amino- und Nitrosyl-Liganden in einer tetragonalen Pyramide.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230148
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  • 3
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden. XCV. η5- Pentamethylcyclopentadienyl-Rhodium-, -Iridium-, (η6-Benzol)-Ruthenium- und Phosphan-Palladium-Komplexe von Prolinmethylester und ProlinamidProfessor Anton Meller zum 65. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1903-1911 
    Details
    ISSN: 0044-2313
    Keywords: Rhodium ; ruthenium ; iridium ; palladium ; proline ; amide complexes ; proline methylester complexes ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes of Biologically Important Ligands. XCV. η5-Pentamethylcyclopentadienyl Rhodium, Iridium, η6- Benzene Ruthenium, and Phosphine Palladium Complexes of Proline Methylester and Proline AmideProline methylester (L1) and proline amide (L2) give with the chloro bridged complexes [(η5 -C5Me5)MCl2]2 (M = Rh, Ir), [(η6 -benzene)RuCl2]2 and [Et3PPdCl2]2 N and N,O coordinated compounds: (η5 -C5Me5)M(Cl2)L1 (1, 2 M = Rh, Ir), [(η5-C5Me5) Rh(Cl)(L2)]+Cl- (5), [(η6- C6Me6) Ru(Cl)(L2)]+Cl- (6), [(η6-p-cymene)Ru(Cl)(L2)]+Cl- (7), [(eta;5-C5Me5)M(Cl)(L2-H+)] (9, 10 M = Rh, Ir), (Et3P)Pd(Cl)2L1 (3), and [(Et3P)Pd(Cl)(L2)]+Cl- (8). The NMR spectra indicate that for 5 and 6 only one diastereoisomer is formed. The complexes 1, 2, 3 and 5 were characterized by X-ray diffraction.
    Notes: Prolinmethylester (L1) und Prolinamid (L2) bilden mit den chlorverbrückten Komplexen [(η5-C5Me5)MCl2]2 (M = Rh, Ir), [(η6-p-Cymol)RuCl2]2 und [Et3PPdCl2]2 Verbindungen mit N- und N,O-Koordination: (η5-C5Me5)M(Cl2)L1 (1, 2 M = Rh, Ir), [(η5-C5Me5) Rh(Cl) (L2)]+Cl- (5), [(η6- C6Me6)Ru(Cl) (L2)]+Cl- (6), [(η6-p- Cymol)Ru(Cl)(L2)]+Cl- (7), [(η5- C5Me5)M(Cl)(L2-H+)] (9, 10 M = Rh, Ir), (Et3P)Pd(Cl)2L1 (3) und [(Et3P)Pd(Cl)(L2)]+Cl- (8). Die NMR Spektren weisen darauf hin, daß von 5 und 6 jeweils nur ein Diastereoisomeres entsteht. Die Komplexe 1, 2, 3 und 5 wurden durch Röntgenstrukturanalyse charakterisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976231214
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