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  • Inorganic Chemistry  (4)
  • Catalysis  (1)
  • Hydrogen bonding  (1)
  • 1
    ISSN: 0009-2940
    Keywords: 1,7-Dimethylocta-2,6-diene-1,8-diyl ; Ruthenium complexes ; α-Amino carboxylates ; α-Amino acid esters ; Peptide esters ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes Containing Biologically Important Ligands, LXXXLXXIX. Mitteilung: Lit. .  -  (η3:η3-C10H16)Ru(IV) Complexes with α-Amino Carboxylates, α-Amino Acid Esters, and Peptide Esters as LigandsReactions of the chloro-bridged bis(allyl) complex [(η3:η3-C10H16)Ru(Cl)(μ-Cl)]2 with α-amino carboxylates and α-amino acid esters afford the complexes (η3:η3-C10H16)(Cl)RuNH2CHRCO2 (2) and (η3:η3-C10H16)(Cl)2-RuNH2CHRCO2R′ (3). Abstraction of chloride from 3 by Ag+ gives the N,O-chelates [(η3:η3-C10H16)(Cl)RuNH2CHRCO2R′]+BF4 (4). Cysteine methyl ester forms the N,S-chelate complex (η3:η3-C10H16)(Cl)RuNH2CH(CO2CH3)CH2S (5), and with histidine methyl ester a dinuclear complex 6 with N,N-histidine bridge is obtained. Compound 3d with L-PheOEt as ligand was characterized by X-ray diffraction.
    Additional Material: 3 Ill.
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  • 2
    ISSN: 0009-2940
    Keywords: Ruthenium complexes ; Osmium complex ; Hydrido complexes ; α-Amino acids ; Oxidative Addition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes of Biologically Important Ligands, LXX[1].- Synthesis, Stereochemistry and Reactions of Ruthenium(II) and Osmium(II) Complexes with α-Amino CarboxylatesHerrn Professor Helmut Werner zum 60. Geburtstag gewidmet.The reactions of MHCl(CO)(PPh3)3 with salts of α-amino acids give the hydrido-N,O-chelate complexes MH(CO)(NH2CHR-COO)(PPh3)2 (1a-g;) M = Ru, Os). Complexes 1a-c can alternatively be prepared by oxidative addition of the appropriate α-amino acid to Ru(CO)3(PPh3)2. The crystal structure of 1b has been determined by an X-ray structural analysis. The leucinato compound 1c is an effective catalyst for the decomposition of formic acid. In contrast, reactions of RuHCl-(CO)(PPh3)3 with α-amino acids afford the chloro-N,O-che-late complexes RuCl(CO)(NH2CHRCOO)(PPh3)2 2a-h. The decomposition reactions of 2c, 2g and2h have been investigated.
    Additional Material: 2 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1127-1130 
    ISSN: 0009-2940
    Keywords: Rhodium(I) ; α-Aminocarboxylate ; Crystal structure ; Hydrogen bonding ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes Containing Biologically Important Ligands, LXXXPart LXXX: Ref. .  -  Synthesis and Crystal Structure of Rhodium(I) Chelates with α-Amino Carboxylates Part LXXX: Ref.The α-amino carboxylate complexes were prepared from Rh(Cl)(CO)(PPh3)2 and H2NC(H)(R)CO2 in the presence of AgBF4 and characterized by X-ray diffraction. In the crystal the complexes form chains by hydrogen bridges between amino and carboxylate groups of adjacent molecules.
    Additional Material: 4 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 729-731 
    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.
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  • 5
    ISSN: 0044-2313
    Keywords: Triphenylphosphine complexes ; hydrido complexes ; N-acyl-α-aminoacidates ; molybdenum ; tungsten ; ruthenium ; iridium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes of Biological Important Ligands. LXXXII. Triphenylphosphine Molybdenum, Tungsten, Ruthenium, and Iridium Complexes of N-Acyl-α-AminocarboxylatesThe reactions of the hydrido complexes RuHCl(CO) · (PPh3)3, RuH2(PPh3)4 and IrH3(PPh3)3 with N-acyl-α-aminocarboxylates give the carboxylate complexes RuCl(O2CCHRNHCOR′)(CO)(PPh3)2 (1-3), RuH(O2CCHRNHCOR′)(PPh3)3 (4-6) and IrH2(O2CCH2NHCOPh)(PPh3)3 (7). The structure of RuCl · (O2CCHNHCOPh)(CO)(PPh3)2 (1) has been determined by x-ray diffraction. The triphenylphosphine complexes MBr · (O2CCH2NHCOR)(CO)2(PPh3)2 (M = Mo, W) (8-12) and Mo(O2CCHRNHCOR′)2(CO)2(PPh3)2 (13-17) are formed from MBr2(CO)2(PPh3)2 (M = Mo, W) with one or two equivalents of N-acyl-a-aminoacidates, respectively.
    Notes: Die Hydrido-Komplexe RuHCl(CO)(PPh3)3, RuH2(PPh3)4 und IrH3(PPh3)3 reagieren mit N-Acyl-α-Amino-carbonsäuren unter Bildung der Carboxylat-Komplexe RuCl(O2CCHRNHCOR′)(CO)(PPh3)2 (1-3), RuH(O2CCHRNHCOR′)(PPh3)3 (4-6) und IrH2(O2CCH2NHCOPh)(PPh3)3 (7). Die Struktur von RuCl(O2CCH2NHCOPh)(CO)(PPh3)2 (1) wurde röntgenographisch bestimmt. Phosphan-Komplexe der Formel MBr(O2CCH2NHCOR)(CO)2(PPh3)2 (M = Mo, W) (8-12) und Mo(O2CCHRNHCOR′)2(CO)2(PPh3)2 (13-17) entstehen bei der Umsetzung von MBr2(CO)2(PPh3)2 mit einem bzw. zwei Äquivalenten N-Acyl-α-Aminocarboxylat-Anionen.
    Additional Material: 3 Ill.
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