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  • 1
    Electronic Resource
    Electronic Resource
    Chemie der Amino-oxime, VIII. Über die Umsetzung von Carbonsäurederivaten mit α-Amino-oximen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1865-1874 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Chemistry of Amino Oximes, VIII. The Reaction of Carboxylic Acid Derivatives with α-AminooximesThe reaction of syn- and anti-α-aminooximes with acetimidic acid ester and orthoacetic acid ester was investigated. Acetimidic acid ester forms imidazoles (4, 8) with syn- as well as with anti-aminooximes. With orthoacetic acid ester anti-aminooximes form the dimeric 4H-imidazole N-oxide 15, whereas syn-ω-aminoacetophenone oxime (7) yields 2.5-diphenylpyrazine N-oxide (26). With N-(oximinoalkyl)formimidic acid esters (21) no cyclisation was observed.
    Notes: Die Reaktionen von syn- und anti-α-Amino-oximen mit Acetimidsäureester und Orthoessigsäureester werden untersucht. Während mit Acetimidsäureester unabhängig von der Oxim-Konfiguration Imidazole (4, 8) entstehen, tritt mit Orthoessigester und anti-Amino-oxim-Ringschluß zum dimeren 4H-Imidazol-N-oxid 15 ein. Mit syn-ω-Amino-acetophenonoxim (7) bildet sich 2.5-Diphenyl-pyrazin-N-oxid (26). Bei N-Oximinoalkyl-formimidsäureestern (21) war kein Ringschluß zu beobachten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050609
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  • 2
    Electronic Resource
    Electronic Resource
    3,4-Dihydro-6-methyl-1,2-benzoxathiin-2,2-dioxid-Derivate mit Enaminketon-Strukturen aus 6-Methyl-4-chromon-3-sulfonsäure-phenylester (1985)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1985 (1985), S. 2012-2016 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 3,4-Dihydro-6-methyl-1,2-benzoxathiine 2,2-Dioxide Derivatives with Enaminone Structures from Phenyl 6-Methyl-4-chromone-3-sulfonatePrimary and secondary amines react with phenyl 6-methyl-4-chromone-3-sulfonate (5) to give 3,4-dihydro-6-methyl-1,2-benzoxathiine 2,2-dioxide derivatives 8a - g with enaminone structures. Probably this ring transformation reaction takes place by an addition-elimination mechanism.
    Notes: Primäre und sekundäre Amine reagieren mit 6-Methyl-4-chromon-3-sulfonsäure-phenylester (5) unter Bildung von 3,4-Dihydro-6-methyl-1,2-benzoxathiin-2,2-dioxid-Derivaten 8a - g mit Enaminketon-Strukturen. Diese Ringtransformationsreaktion läuft wahrscheinlich nach einem Additions-Eliminierungs-Mechanismus ab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198519851009
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  • 3
    Electronic Resource
    Electronic Resource
    Umsetzungen von 4-Chromon-3-sulfonsäure-phenylester mit Amidinen (1986)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1986 (1986), S. 1124-1126 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Phenyl 4-Chromone-3-sulfonate with AmidinesThe amidines 2a - e undergo with phenyl 4-chromone-3-sulfonate (1) a ring transformation to give the benzoxathiino-pyrimidines 6a - e.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198619860617
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  • 4
    Electronic Resource
    Electronic Resource
    Umsetzungen von 4-Chromon-3-sulfonsäure-phenylester mit methylenaktiven Verbindungen (1987)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 549-550 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Phenyl 4-Chromone-3-sulfonate with Methylene Active CompoundsThe methylene active compounds 2a-c undergo with phenyl 4-chromone-3-sulfonate (1) ring transformations to give the benzoxathiinopyridones 5a-c.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198719870375
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  • 5
    Electronic Resource
    Electronic Resource
    Notiz zur Synthese von 1,2-Benzoxathiin-2,2-dioxid-Derivaten aus 3-Chromonsulfonsäure (1984)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 1395-1397 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Note on the Synthesis of 1,2-Benzoxathiine 2,2-Dioxide Derivatives from 3-Chromonesulfonic AcidStarting with 3-chromonesulfonic acid (1) the 1,2-benzoxathiine 2,2-dioxide derivatives 7 and 8 have been obtained by ring transformation of the sulfonyl chloride 4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198419840716
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  • 6
    Electronic Resource
    Electronic Resource
    Notiz zur Reaktion von 3-Acylchromonen mit Amidinen (1977)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1050-1052 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Note on the Reaction of 3-Acylchromones with Amidines3-Acylchromones 1 react with compounds containing amidine groups in presence of sodium ethoxide to give 5-hydroxy-5H-benzopyrano[4,3-d]pyrimidines and 5-acylpyrimidines 2, the latter of which can also be formed exclusively.
    Notes: 3-Acylchromone 1 reagieren mit amidingruppenhaltigen Verbindungen in Gegenwart von Natriumethylat zu 5-Hydroxy-5H-benzopyrano[4,3-d]pyrimidinen und 5-Acylpyrimidinen 2, welch letztere auch ausschließlich entstehen können.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197719770618
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