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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1573-1111
    Keywords: Guest molecules ; host/guest chemistry ; host molecules ; inclusion (of molecules) ; large rings ; macrocyclic compounds ; receptor model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The syntheses of the functionalized carbomacrocycles5–11 are reported. The diastereomeric diols10a, b form a stable methanol clathrate. The X-ray analysis of9 gives insight into the dimensions of the cavity. In the course of the preparation of4 the side products22 and23 have been characterized. Aldol condensations are also used for the syntheses of the 30-membered ring15 and of its hydrogenation product16. The diesters12–14 have been prepared to make available functionalized carbomacrocycles with high ring member numbers by acyloin condensation. In this connection, the 28-membered tetra-yne20 and its precursors18 and19 are described.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1573-1111
    Keywords: Benzene inclusion ; cyclovoltammetry ; electrochemistry ; ester ; host/guest chemistry ; lactone ; macrobicyclic compounds ; macrocyclic molecules ; triphenylamine units
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The synthesis of a family of new host type molecules (1–4) bearing six lactone structural units is described. One of the lactones (1) forms crystals which contain benzene in a 1∶2 (host:guest) ratio. The complexation behaviour towards potential guest molecules and the electrochemical properties of the molecules are studied. Compared to an analogous open chained ester (18) the electrochemical potentials of the bicyclic lactones,1, 2 are higher due to the different steric environment.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1573-1111
    Keywords: Alcohol inclusion ; clathrate ; clathrand ; enrichment of ethanol ; host/guest chemistry ; inclusion ; lattice inclusion ; separation of solvents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new host compound of the onium salt type,N-(3-biphenylmethyl)quininium bromide (1), is described. This host compound shows an unusually high selectivity for the inclusion of ethanol. Using this clathrand, ethanol can be extracted from a variety of solvent mixtures. In most cases, a remarkable enrichment of the ethanol is observed. The following solvents in a mixture with ethanol remain in the mother liquid: methanol,n-propanol,n-hexane, pyridine.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1573-1111
    Keywords: Cavity ; complex formation ; ethanol adduct ; ethanol inclusion ; host/guest chemistry ; inclusion compounds ; lactam ; lactone ; macrotricyclic compounds ; perdeuteroethanol ; spacer groups
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The syntheses of several macrotricyclic hexalactams (1–3) and of a corresponding hexalactone (4) are described in detail for the first time. The molecules have a basket shaped skeleton and contain a non-collapsible cavity, the size and shape of which is varied by use of spacer groups. Compounds1–3 selectively form crystalline adducts with ethanol as guest; the macrotricyclic hexaester4 does not. Evidence for an interaction of1 with ethanol was obtained by exchange experiments with perdeuteroethanol. Complexation experiments in solution did not show significant host/guest interactions with the guest chosen.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 2 (1996), S. 1585-1595 
    ISSN: 0947-6539
    Keywords: concave hydrocarbons ; cyclophanes ; host/guest chemistry ; ion-selective electrodes ; prismands ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Concave hydrocarbons, such as 1 (C36H36), 4 (C60H60), 5 (C54H48), and 6 (C60H52), represent three-dimensionally clamped analogues of π-prismands. They encapsulate small metal ions and accomplish metal-ion extraction from aqueous solution. Their remarkable selectivity allows applications such as incorporation in ion-selective electrodes. The synthetic route is based on well-established cyclophane methodology and, thus, offers a general approach to a whole family of concave hydrocarbons.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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