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  • 1
    ISSN: 1573-2622
    Keywords: Craniosynostosis ; Foot abnormalities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A family with 15 individuals in four successive generations affected by Jackson-Weiss syndrome, craniosynostosis with Crouzon-variant-like phenotype and feet's abnormalities, is presented. An autosomal dominant inheritance pattern with complete penetrance, variable expressivity, and wide intrafamilial variation, more among, less within the same generation, was observed. Concerning the frequency and severity of complications, the evolution of craniofacial deformities seems to parallel those described with Crouzon syndrome, suggesting the similar evaluation and management.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 1637-1650 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Solvolysis of 2-Cyclohexyl-2-phenylethyl Tosylates Substituted at the Phenyl RingThe solvolysis of 2-cyclohexyl-2-phenylethyl tosylates substituted at the phenyl ring by X = p-H (1), p-NO2, p-IO2, p-CN, p-COCH3, m-Cl, m-F, p-Cl, p-Br, p-CH3, and p-OCH3 (2a - k) in ethanol, acetic acid, and formic acid has been investigated. The total rate constants kt were determined and the obtained values together with corresponding Hammet σ constants were used to calculate the rate constants kΔ (for aryl-assisted reactions) and ks (for non-assisted reactions). The acetolysis values FkΔ and ks of 2-cyclohexyl-2-phenylethyl tosylate (1) at 100°C are in good agreement with those formerly obtained on the basis of product analysis.
    Notes: Es wurde die Solvolyse von 2-Cyclohexyl-2-phenylethyltosylaten, die am Phenylring durch X = p-H (1), p-NO2, p-IO2, p-CN, p-COCH3, m-Cl, m-F, p-Cl, p-Br, p-CH3 und p-OCH3 (2a - k) substituiert sind, in Ethanol, Essigsäure und Ameisensäure untersucht. Die Gesamtgeschwindigkeitskonstanten kt wurden bestimmt und daraus mit den entsprechenden Hammet-Konstanten σ die Geschwindigkeitskonstanten kΔ (für Reaktionen unter Beteiligung der Arylgruppe) und ks (für Reaktionen ohne Beteiligung der Arylgruppe) berechnet. Die Werte FkΔ und ks für die Acetolyse von 2-Cyclohexyl-2-phenylethyltosylat (1) bei 100°C stimmen gut mit denen überein, die früher aufgrund von Produktanalysen erhalten wurden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1976 (1976), S. 1964-1971 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Solvolysis of 2-Cycloalkyl-2-phenylethyl Tosylates2-Cyclohexyl-2-phenylethyl tosylate (1 a) is solvolyzed in solvents of different ionization and nucleophilic strengths. The alcohols and esters produced have been determined quantitatively. The extents of 1,2-migration of phenyl, cyclohexyl and hydrogen have been calculated from the reaction products (Table I). The reaction kinetics of l a in various solvents compared with that of 2-phenylethyl tosylate (1 d) shows that the cyclohexyl group in the P-position effects an acceleration of reaction (Figure 1).
    Notes: (2-Cyclohexyl-2-phenyläthyl)tosylat (1 a) wird in Lösungsmitteln verschiedener Ionisierungsstärke und Nucleophilie solvolysiert; die entstehenden Alkohole und Ester werden quantitativ bestimmt. Aus den Reaktionsprodukten (Tabelle 1) sind die Anteile der 1,2-Wanderung von Phenyl, Cyclohexyl und Wasserstoff ermittelt worden. Die Reaktionskinetik von la in verschiedenen Lösungsmitteln (Abbildung 1 ) zeigt, daß die Cyclohexylgruppe am β-Kohlenstoffatom eine Reaktionsbeschleunigung gegenüber (2-l)tosylat (1 d) bewirkt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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