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  • Carboxamidines  (1)
  • Dichloromethane activation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Activation of Dichloromethane by (Phosphane)orhodium(I) Complexes - X-ray Structure of [{(PEt3)2RhCl}2(μ-Cl)2(μ-CH2)] (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 349-353 
    Details
    ISSN: 1434-1948
    Keywords: Rhodium ; Phosphanes ; Ligand redistribution ; Dichloromethane activation ; Oxidative addition ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dichloromethane reacts with dinuclear rhodium complexes [{(PR3)2Rh}2(μ-Cl)2] to give the bridging-methylene complexes [{(PR3)2RhCl}2(μ-Cl)2(μ-CH2)] (PR3 = PEt3, PPh2Me). The structure of the PEt3 complex has been established by X-ray diffraction study. The early stages of the reaction of [{(C8H14)2Rh}2(μ-Cl)2] with monophosphanes have been monitored by 31P NMR, evidencing chloride bridges cleavage and phosphane redistribution processes.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Enaminones in the Synthesis of New Polyaza Heterocycles (1998)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1998 (1998), S. 2907-2912 
    Details
    ISSN: 1434-193X
    Keywords: Polyaza heterocycles ; Enaminones ; Pyrimidines ; Carboxamidines ; Guanidines ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple and efficient method for the synthesis of larger polyaza heterocyclic structures 6a, 6b and 8 with 1,3-pyrimidine units has been developed, based on the reaction of enaminones with appropriate guanidines or carboxamidines under basic conditions. Using this procedure, several new, optically active polyaza heterocycles 10, 12 and 13 have been prepared in good yields, from enantiomerically pure Nα-Boc-L-arginine as guanidine reagents.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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