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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3509-3517 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrazidines, II. Synthesis of Pyrrolo[1,2-b]-1,2,4,5-tetrazinesThe reaction of acetohydrazide hydrazone hydrochloride (2) with 1,4-bifunctional compounds, like malealdehyde, derivatives of maleic acid (4, 6a-c), dichloro- (10a) or dibromomalealdehydic acid (10b), affords derivatives of the unknown pyrrolo[1,2-b]-1,2,4,5-tetrazines (3, 5, 11).
    Notes: Durch Reaktion von Acethydrazidin-hydrochlorid (2) mit 1,4-bifunktionellen Verbindungen, wie Maleindialdehyd, Maleinsäurederivaten (4, 6a-c). Dichlor- (10a) oder Dibrommaleinaldehydsäure (10b), werden verschiedene Vertreter der bisher unbekannten Pyrrolo[1,2-b]-1,2,4,5-tetrazine (3, 5, 11) erhalten.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1981-1990 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrazidines, III. Synthesis of 1,2,4,5-Tetrazino[3,2-a]isoindolesReaction of acetohydrazide hydrazone hydrochloride (1) with phthalaldehydic acid (5) yields 3-methyl-1,10b-dihydro-1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-one (8), which affords 1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-one (9a) by mild oxidation. 9a is also obtained by the reaction of 1 with the phthalic acid derivatives 6a, 7a, and 7b. Starting with 9a, the 1,2,4,5-tetrazino[3,2-a]isoindoles 12-15 are synthesized. Interaction of 1 and 3-nitrophthalic anhydride (6b) yields two isomeric nitro-1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-ones (9b,c). Oxidation of 9a or b with KMnO4 in methanol affords the 1,2,4,5-tetrazino 17a, b. Mild Oxidation of 9a with KMnO4 in water/trichloromethane yields a dimer (20), which dissociates in nitromethane into the radical 19.
    Notes: Durch Reaktion von Acetohydrazid-hydrazon-hydrochlorid (1) mit Phthaladehydsäure (5) wird 3-Methyl-1, 10b-dihydro-1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-on (8) erhalten das durch milde Oxidation in 3-Methyl-1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-on (9a) übergeführt wird. 9a entsteht auch aus 1 und den Phthalsäurederivaten 6a, 7a und 7b. Ausgehend von 9a werden die 1,2,4,5-Tetrazino[3,2-a]isoindole 12-15 synthetisiert. Aus 1 und 3-Nitrophthalsäureanhydrid (6b) werden zwei isomere Nitro-1,2,4,5-tetrazino[3,2-a]isoindol-6(4H)-one (9b, c) erhalten. Oxidation von 9a oder b mit KMnO 4 in Methanol ergibt die 1,2,4,5-Tetrazine 17a, b. Vorsichtige Oxidation von 9a mit KmnO4 in Wasser/Chloroform ergibt ein Dimeres (20), das in Nitromethan in das Radikal 19 dissoziiert.
    Additional Material: 2 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1120-1123 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrazidines, I. - Synthesis of N-Unsubstituted HydrazidinesThe reaction of the amidrazone hydrochlorides 2a-2d with dry hydrazine at 40°C leads in good yields to the formation of the hydrazidine hydrochlorides 3a-3d, which have no substituents at the 4 nitrogen atoms. The reaction conditions for teh synthesis and some reactions of 3a-3d are given.
    Notes: Die Umsetzung der Amidrazon-hydrochloride 2a-2d mit wasserfreiem Hydrazin bei 40°C führt in guten Ausbeuten zu den an allen Stickstoffatomen unsubstituierten Hydrazidinhydrochloriden 3a-3d. Es erden die Reaktionsbedingungen für die Synthese von 3a-3d sowie einige Reaktionen angegeben.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1985 (1985), S. 78-89 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrazidines, IV.  -  Reaction of Hydrazidines with 1,2-Bifunctional CompoundsHydrazide hydrazones 1 react with 1,2-bifunctional compounds (2, 21, 23, 26, 30, 32) to give preferentially 4-amino-1,2,4-triazines (9, 13, 22, 25, 27, 31, 35). Some reactions of these substances are described.
    Notes: Hydrazid-hydrazone 1 reagieren mit 1,2-bifunktionellen Verbindungen (2, 21, 23, 26, 30, 32) vor allem zu 4-Amino-1,2,4-triazinen (9, 13, 22, 25, 27, 31, 35). Einige Reaktionen dieser Verbindungen werden beschrieben.
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