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  • Inorganic Chemistry  (3)
  • 13C NMR parameters  (1)
  • Aminonitropyridines
  • 1990-1994  (4)
  • 1994  (1)
  • 1991  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Adamantan als Baustein neuer Araliphane Synthese, Spektroskopie und Kristallstrukturen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 915-922 
    Details
    ISSN: 0009-2940
    Keywords: Adamantane ; Adamantanophanes ; Cyclophanes ; Medium-membered rings ; Sulfone pyrolysis ; Phanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Adamantane as a Building Block of New Araliphanes - Synthesis, Spectroscopy, and Crystal StructuresExchange of benzene units for aliphatic building blocks in cyclophanes leads to new molecules of the “araliphane” type. With adamantane the araliphanes 2 - 4 are synthesized. Their stereochemical behavior as shown by NMR studies and X-ray crystallographic analyses differs significantly from that of their aromatic counterparts. The signals of the intraannular adamantane hydrogens are strongly shifted upfield up to δ=- 2.18 (in 2). 4 is obtained as a racemic mixture of enantiomers (in the crystalline state) and shows a boat-like deformation of the benzene moiety.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240436
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  • 2
    Electronic Resource
    Electronic Resource
    Mit Donorzentren versehener korbförmiger Molekülhohlraum  -  Darstellung, Struktur, Eigenschaften (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2323-2327 
    Details
    ISSN: 0009-2940
    Keywords: Basket-shaped molecules ; Pyridine derivatives ; Macrocyclic ; Macrocyclic ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Basket-shaped Molecular Cavity-Containing Donor Centres  -  Synthesis, Structure, PropertiesThe macrocyclic basket-shaped molecule 2, composed of three 4-donor-substituted pyridine units, is synthesized by cyclisation of the chloromethyl compound 7 with sulfonamide 8. The X-ray structure analysis of 2 gives an impression of the shape of the molecular basket. Furthermore it demonstrates that the toluenesulfonamide residues interlink, creating dimeric units of 2 in the crystal.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241027
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  • 3
    Electronic Resource
    Electronic Resource
    Molekulare Pinzetten aus Cyclophan-Bausteinen (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 743-757 
    Details
    ISSN: 0009-2940
    Keywords: Bond formation ; C—C / Host-Guest complexation ; Metacyclophanes ; Conformation, syn, anti ; Hagihara coupling ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Molecular Tweezers from Cyclophane Building BlocksMolecular tweezer compounds 1-6 with convergent carboxyl groups are prepared from suitable functionalized [2.2]-and dithia[3.3]metacyclophane building blocks by using several multistep strategies. The C—C coupling of two cyclophanes according to the Hagihara method leads to alkynespacered double cyclophanes. These new preorganized, acyclic host compounds of the cyclophane-type react as molecular tweezers and can selectively “grasp” guest molecules and bind them strongly. X-ray analyses underline the syn conformations of the dithia[3.3]- and the anti conformation of the [2.2]metacyclophanes.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270426
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  • 4
    Electronic Resource
    Electronic Resource
    Multinuclear magnetic resonance study of 1,3,3-trimethylbicyclo [2.2.1]heptan-2-one (fenchone) oxime, its five monochloro derivatives and a dehydrochlorination product (1991)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 29 (1991), S. 267-272 
    Details
    ISSN: 0749-1581
    Keywords: Fenchone oxime ; Monochlorofenchone oximes ; Stereochemistry of oxime group ; 1H NMR parameters ; 13C NMR parameters ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fenchone oxime, 5-exo-chlorofenchone oxime, 6-exo-chlorofenchone oxime, 7-anti-chlorofenchone oxime, 8-chlorofenchone oxime, 9-chlorofenchone oxime and a dehydrochlorination product of 10-chlorofenchone oxime were synthesized from fenchone and the corresponding chlorofenchones. The 1H, 13C and 17O NMR spectra of the oximes and the dehydrochlorination product were recorded. The NMR data were compared with the corresponding parameters obtained earlier for fenchone and monochlorofenchones in order to determine the differences between the carbonyl and oxime substituents from the NMR spectroscopic point of view, and to assign the stereochemistry of the oxime group. This stereochemistry could not, however, be assigned solely by NMR spectroscopy.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260290313
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