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  • 1
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 381-388 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1-Aza- and 1,9-DiazatriptycenesThe polycyclic 1,5-diketone 4 is synthesized via the enamine 2 from ketone 1 and phenyl vinyl ketone (3). On reacting the 1,5-diketone 4 with hydroxylamine the expected ring closure to the 1-azatriptycene 6 competes with a ring cleavage by an anomalous Beckmann rearrangement of the oxime yielding the intermediate nitrile 10 which cyclizes to afford the β-anthracenyl-α-aminopyridine 7. [4 + 2] Cycloaddition of dehydrobenzene, generated by diazotation of anthranilic acid, with the pyrido[3,2-g]quinolines 13a, b produces the diazatriptycenes 15a, b.
    Notes: Aus dem Keton 1 wird via Enamin 2 mit Phenylvinylketon (3) das polycyclische 1,5-Diketon 4 hergestellt. Bei dessen Umsetzung mit Hydroxylamin konkurriert der erwartete Ringschluß zum 1-Azatriptycen 6 mit einer Ringöffnung durch anomale Beckmann-Umlagerung des Oxims 9 zum intermediären Nitril 10, das zum β-Anthracenyl-α-aminopyridin 7 cyclisiert. [4 + 2]-Cycloaddition von Dehydrobenzol, das durch Diazotierung von Anthranilsäure erzeugt wird, mit den Pyrido[3,2-g]chinolinen 13a, b ergibt die Diazatriptycene 15a, b.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 877-887 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 5,10-Bridged Pyrido[3,2-g]quinolines via [4+2] Cycloaddition of Dienophiles to Pyrido[3,2-g]quinolinesIn a Diels-Alder reaction, (E)-1,2-dichloroethene (5a), α-acetoxyacrylonitrile (5b), and maleic anhydride (8), respectively, add to the medium ring of some pyrido[3,2-g]quinolines to afford the 5,10-bridged pyrido[3,2-g]quinolines 6a - c, e, f, and 9a - c, respectively. The regioisomeric α-acetoxyacrylonitrile adducts of 4b arise in a ration of 6e:6f = 94.6. On hydrolysis of this mixture, only ketone 7 is obtained. The structures of all compounds are proven by their proton and carbon-13 spectra.
    Notes: (E)-1,2-Dichlorethen (5a), α-Acetoxyacrylnitril (5b) bzw. Maleinsäureanhydrid (8) addieren sich in einer Diels-Alder-Reaktion an den mittleren Ring einiger Pyrido[3,2-g]chinoline 4 zu den 5, 10-überbrückten Pyrido[3,2g]chinolinen 6a - c, e, f bzw. 9a - c. Die regioisomeren α-Acetoxyacrylnitril-Addukte von 4b entstehen dabei im Verhältnis 6e:6f = 94:6. Durch Hydrolyse erhält man daraus das einheitliche Keton 7. Die Strukturen aller Verbindungen wurden 1H- und 13C-NMR-spektroskopisch bewiesen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 65 (1993), S. 1506-1508 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 192 (1991), S. 1193-1205 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 2-Ethyl-2-hydroxymethyltrimethylene carbonate (5-ethyl-5-hydroxymethyl-1,3-dioxan-2-one) (1) was treated with trimethylsilyl chloride, benzyl chloroformate and phenyl isocyanate to give the corresponding 5,5-disubstituted 1,3-dioxan-2-ones 2, 3 and 4. These monomers were subjected to anionic ring-opening polymerization reactions with lithium alcoholates as initiators. The polymers obtained usually exhibit linear structure; under special conditions slightly branched polymers were obtained. Poly(2) and poly(3) were subjected to polymer-analogous reactions - hydrolysis and hydrogenation - by which the protective groups are removed and poly(1) was obtained. The hydroxyl groups in poly(1) are susceptible to a polymer-analogous reaction. Poly(4) obtained by reaction of poly(1) with phenyl isocyanate was identical with poly(4) obtained by ring-opening polymerization of the corresponding monomer 4. All these new monomers were characterized by means of 1H and 13C NMR spectroscopy as well as elemental analysis. The polymers were analyzed with respect to their primary structure, their molecular weight and molecular weight distribution. The thermal properties of some of the polymers are discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 133-146 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Reactions of Some Pyrido[3,2-g]quinolines (1,8-Diazaanthracenes)The pyrido[3,2-g]quinolines 1b, c, and e are synthesized for the first time directly by Friedländer condensation from 4,6-diaminoisophthalic aldehyde (6) and ketones. Copper(I)-catalyzed decarboxylation of the 2,8-dicarboxylic acid 1e occurs in diethylene glycol monoethyl ether at temperatures as low as 165°C affording the parent compound 1a in high yield. Despite steric hindrance by a tert-butyl group methyllithium adds to position 2 of the 2,8-di-tert-butyl compound 1c producing the 1,2-dihydropyrido[3,2-g]quinoline 9. Dehydrogenation of the octahydroquino[3,2-b]acridine 7 using palladium on carbon at 250°C yields the 1,2,3,4,7,12-hexahydro- (10) and the 5,14-dihydroquino[3,2-b]acridine (11).
    Notes: Die Pyrido[3,2-g]chinoline 1b, c und e werden erstmals unmittelbar durch Friedländer-Kondensation aus 4,6-Diaminoisophthalaldehyd (6) mit Ketonen dargestellt. Kupfer(I)-katalysierte Decarboxylierung der 2,8-Dicarbonsäure 1e führt in Diethylenglycolmonomethylether bereits bei 165°C in guter Ausbeute zur Stammverbindung 1a. Trotz sterischer Hinderung durch eine tert-Butylgruppe addiert sich Methyllithium an die 2-Stellung der 2,8-Di-tert-butylverbindung 1c, wobei das 1,2-Dihydropyrido[3,2-g]chinolin 9 entsteht. Die Dehydrierung des Octahydrochino[3,2-b]acridins 7 mit Palladium auf Kohle bei 250°C ergibt 1,2,3,4,7,12-Hexahydro- (10) und 5,14-Dihydrochino[3,2-b]acridin (11).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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