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  • 1970-1974  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 950-953 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Trinitroazaadamantane Derivatives1.3.5-Trinitrobenzene is converted on reduction with sodium boron hydride or Grignard compounds and subsequent reaction with formaldehyde and an ammonium salt into 3.5.7-trinitro-l-azaadamantane (8a) and derivatives of this compound (8b-e, 12, 13).
    Notes: 1.3.5-Trinitro-benzol läßt sich durch Reduktion mit Natriumborhydrid oder Grignard-Verbindungen und anschließende Aminoalkylierung zu 3.5.7-Trinitro-l-aza-adamantan (8a) sowie Derivaten davon (8b-e, 12, 13) umsetzen.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 972-973 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 2856-2863 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Nitroenamines, IX Introduction of the Nitrovinyl Group into Aldehydes and KetonesAldehydes and ketones containing a methylene group at the α-position react with 1-(dimethyl-amino)-2-nitroethylene (2) to give 2-aci-nitroethylidene derivatives. Ketones with two active methylene groups can react with one or two equivalents of 2. Treatment of derivatives of 4-aci-nitrocrotonaldehyde with nitroacetaldehyde produces the corresponding derivatives of 1.3-dinitrobenzene.
    Notes: Aldehyde und Ketone mit α-ständiger Methylengruppe lassen sich mit 2-Nitro-1-dimethylamino-äthylen (2) zu 2-aci-Nitro-äthyliden-Derivaten umsetzen. Ketone mit zwei aktiven Methylengruppen können mit einem oder zwei Åquivalenten 2 reagieren. Die erhaltenen 4-aci-Nitro-crotonaldehyd-Derivate reagieren mit Nitroacetaldehyd zu den entsprechenden Derivaten des 1.3-Dinitro-benzols.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1688-1694 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of 2,5-Dinitrofurane with CH-Acidic CompoundsReaction of 2,5-Dinitrofurane with anions of CH-acidic compounds results in substitution of one of the nitro groups.
    Notes: Bei der Umsetzung von 2,5-Dinitrofuran mit Anionen CH-acider Verbindungen wird eine der Nitrogruppen verdrängt.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 440-448 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Nitroenamines, VIII. Introduction of the Acetoxylidene Group into Ketones Containing a Methyl or Methylene Group at the α-PositionKetones containing a methyl or methylene group at the α-position react with 2-nitro-1-(dimethylamino)propene and alcoholate to give 2-aci-nitropropylidene derivatives. Conversion of the aci-nitro group into a carbonyl group leads to the formation of α,β-unsaturated 1,4-diketones.
    Notes: Ketonen mit α-ständiger Methyl-oder Methylengruppe lassen sich mit 2-Nitro-1-dimethylamino-propen-(1) und Alkoholat zu 2-aci-Nitro-propyliden-Derivaten umsetzen. Durch Umwandlung der aci-Nitrogruppe in eine Carbonylfunktion sind α.β-ungesättigte 1.4-Diketone zugänglich.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1509-1517 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Nitroenamines, XII. Reaction of Esters and Lactones with NitroenaminesLithium salts of carboxylic esters and lactones with a methylene group in the α-position react with 1-dimethylamino-2-nitroethylene or 1-dimethylamino-2-nitro-1-propene to give the corresponding aci-nitroethylidene- or aci-nitropropylidene derivatives (3 + 4 → 5). On silica gel the compounds 5d - k are transformed into the keto esters 9d - k.
    Notes: Ester von Carbonsäuren sowie Lactone mit α-ständiger Methylen-Gruppe lassen sich über die Lithium-Salze mit 1-Dimethylamino-2-nitroäthylen oder 1-Dimethylamino-2-nitro-1-propen zu aci-Nitroäthyliden- bzw. aci-Nitropropyliden-Derivaten umsetzen (3 + 4 → 5). Die Verbindungen 5d - k gehen auf Kieselgel in die Ketoester 9d - k über.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1-6 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Heterocyclic Nitro Compounds, III Reactions of 2-Chloro-5-nitro-and 2-Chloro-3-niotropyridinium Salts with BasesThe halogen atom in 2-chloro-5nitro-and 2-chloro-3-nitropyridinium salts is easily substituted by basic reagents. On addition of a second basic equivalent dihydropyridin derivatives are obtained. 1-Ethyl-2-methoxy-5-nitropyridinium salts are strong alkylating agents which transfer their O-methyl group to benzoate, iodide, bromide.
    Notes: In 2-Chlor-5-nitro- und 2-Chlor-3-nitro-pyridiniumsalzen wird das Halogen-Atom leicht durch Basen verdrängt. Anlagerung eines zweiten Basenäquivalents ergibt Dihydropyridin-Derivate. 5-Nitiro-2-methoxy-1-äthyl-pyridiniumsalze sind starke Alkylierungsmittel, die die O-Methylgruppe auf Benzoat, Jodid und Bromid übertragen.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1499-1508 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Nitroenamines, XI. Synthesis of Saturated and Unsaturated 1,4-Dicarbonyl CompoundsKetones with a methyl or methylene group in α-position react with 1-dimethylamino-2-nitro-1-propene in the presence of bases to give aci-nitropropylidene derivatives (5 + 6 → 7). These nitroketones are transformed into the corresponding 1,4-dicarbonyl compounds 9 by adsorption on silicagel, by oxidation with peroxodisulfate, or by reduction with ascorbic acid. The saturated 1,4-dicarbonyl compounds 12 are obtained by simultaneous action of ascorbic acid and copper powder on 7.
    Notes: Ketone mit α-ständiger Methyl- oder Methylengruppe lassen sich mit 1-Dimethylamino-2-nitro-1-propen in Gegenwart von Basen zu aci-Nitropropyliden-Derivaten umsetzen (5 + 6 → 7). Diese aci-Nitro-Ketone werden auf Kieselgel in die entsprechenden 1,4-Dicarbonylverbindungen 9 umgewandelt. Andere Methoden zur Darstellung von 9 aus 7 wie Oxidation mit Peroxodisulfat oder Reduktion mit Ascorbinsäure bringen in vielen Fällen gute Ausbeuten, sind aber nicht allgemein anwendbar. Bei gleichzeitiger Einwirkung von Ascorbinsäure und Kupferpulver auf aci-Nitro-Ketone der allgemeinen Struktur 7 erhält man die entsprechenden gesättigten 1,4-Dicarbonylverbindungen 12.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2148-2151 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Reactions of 3-Hydroxy-2-diazoindan-1-ones2-Diazo-indane-1,3-dione (1) is reduced to 3-hydroxy-2-diazo-indan-1-one (2) by sodium borohydride. The rearrangement of the benzoate 3 of compound 2 into 2-benzoyloxy-indenone 6 is performed by heating with cupric oxide.
    Notes: 2-Diazo-indandion-(1.3) (1) wird durch Natriumborhydrid zu 3-Hydroxy-2-diazo-indanon-(1) (2) reduziert. Dessen Benzoesäureester 3 läßt sich thermisch in Gegenwart von Kupferoxid in 2-Benzoyloxy-inden-(2)-on-(1) (6) überführen.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2943-2949 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Maillard Reaction, VII. Formation of β-Carbolin Derivatives by Reaction of Tryptamine with Xylose and Glucose1-(2-Furyl)-β-carboline (4) and 6,7-dihydro-12H-indolo[2,3-α]quinolizin-5-ium-l-olate (3) are obtained when tryptamine and xylose react in a neutral aqueous solution at 160°C. The same pyridiniumbetaine as well as 1-acetyl-β-carboline (15) are formed from tryptamine and glucose.
    Notes: Tryptamin und Xylose reagieren in neutraler wäßriger Lösung bei 160°C unter Bildung von 1-(2-Furyl)-β-carbolin (4) und 6,7-Dihydro-12H-indolo[2,3-α]chinolizin-5-ium-l-olat (3). Das gleiche Pyridiniumbetain sowie 1-Acetyl-β-carbolin (15) entstehen bei der Umsetzung von Tryptamin mit Glucose.
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