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  • Organic Chemistry  (33)
  • Communication in chemistry  (1)
  • Optical activity  (1)
  • 1980-1984  (18)
  • 1970-1974  (13)
  • 1960-1964  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Chemie reaktiver Kationen von Schwefeldioxidanalogen, IV. N-Methyl-N-sulfinylmethanaminiumsalze  -  Umsetzungen mit Carbonyl- und Thiocarbonylverbindungen (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 65-69 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Reactive Cations Derived from Sulfur Dioxide Analogues, IV1).  -  N-Methyl-N-sulfinylmethanaminium Salts  -  Reactions with Carbonyl and Thiocarbonyl CompoundsN-Methyl-N-sulfinylmethanaminium tetrafluoroborate (1) reacts with aromatic aldehydes by elemination of SO2 to form the imonium salts 3, with thiones, dithiocarboxylic, and trithiocarbonic acid derivatives by formal loss of S2O to give the imonium salts 5, 7, 10, and 12. The rotation barrier around the CN bond has been determined for 10 as 69.5 and for 12 as 77.8 kJ/mol.
    Notes: N-Methyl-N-sulfinylmethanaminium-tetrafluoroborat (1) reagiert mit aromatischen Aldehyden unter SO2-Abspaltung zu den Imoniumsalzen 3, mit Thionen, Dithiocarbonsäure- und Trithio-kohlensäurederivaten unter formaler Abspaltung von S2O zu den Imoniumsalzen 5, 7, 10 und 12. Die Rotationsbarriere um die CN-Bindung wird für 10 zu 69.5 und für 12 zu 77.8 kJ/mol bestimmt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810112
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  • 2
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, V. 1,3-Cyclohexadien-5,6-dicarbonsäurederivate als Reaktionspartner (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 210-223 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, V. 1,3-Cyclohexadiene-5,6-dicarboxylic Acid Derivatives as ReactantsThe use of 1,3-cyclohexadiene-5,6-dicarboxylic acid derivatives as educts for the reaction sequence: Diels-Alder reaction with nitroso compounds, reduction of the adducts, hydroxylation, gives hexa-substituted cyclohexanes. However, attempts to synthesize inosamines by this method failed.
    Notes: Die Verwendung von 1,3-Cyclohexadien-5,6-dicarbonsäurederivaten 1 als Edukte für die Reaktionsfolge: Diels-Alder-Reaktion mit Nitrosoverbindungen, Reduktion der Addukte, Hydroxylierung, führt zwar zu hexasubstituierten Cyclohexanen; Versuche zur Inosaminsynthese auf diesem Wege scheiterten jedoch.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810205
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  • 3
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, IV. Darstellung und Stereochemie von Didesoxyinosaminderivaten (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 202-209 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, IV.  -  Preparation and Stereochemistry of Dideoxyinosamine DerivativesThe general method for the synthesis of polyhydroxy amines by Diels-Alder reactions with a nitroso compound, reduction of the adduct with cleavage of the N  -  O bond and hydroxylation of the remaining C = C-double bond, can also be realized with α-chloronitrosocyclohexane as dienophile, in good yield. Primary amines are synthesized in this way.
    Notes: Der generelle Weg zur Synthese von Polyhydroxyaminen über die Stufen Diels-Alder-Reaktion mit einer Nitrosoverbindung, Reduktion des Adduktes unter Spaltung der N  -  O-Bindung und Hydroxylierung der verbliebenen C = C-Doppelbindung, ist auch mit α-Chlornitrosocyclohexan als Reagens in guter Ausbeute realisierbar; er führt zu primären Aminen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810204
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  • 4
    Electronic Resource
    Electronic Resource
    En-Reaktionen mit 4-Methyl-N-sulfinylbenzolsulfonamid  -  Struktur und Reaktivität der En-Komponente (1980)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 843-857 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of N-Sulfinyl Compounds, XII1).  -  Ene Reactions with 4-Methyl-N-sulfinylbenzolsulfonamid  -  Structure and Reactivity of the Ene Components4-Methyl-N-sulfinylbenzolsulfonamid (1) is a highly reactive enophile. Its reactions with a large number of alkenes 2 have been investigated. Structure-reactivity correlations, as well as conclusions about the regio- and stereospecifity of the reaction and subsequent processes are described.
    Notes: 4-Methyl-N-sulfinylbenzolsulfonamid (1) ist ein sehr reaktives Enophil. Seine Umsetzungen mit einer großen Zahl von Alkenen 2 wurden untersucht; die Ergebnisse erlauben Aussagen über Struktur-Reaktivitäts-Beziehungen bei 2 sowie die Regio- und Stereospezifität der Reaktion und ihrer Folgereaktionen.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198019800604
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  • 5
    Electronic Resource
    Electronic Resource
    Chemie reaktiver Kationen von Schwefeldioxidanalogen, III. N-Methyl-N-sulfinylmethanaminiumsalze  -  Darstellung und Cycloadditionen mit Dienen sowie Diazomethan (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 58-64 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Reactive Cations Derived from Sulfur Dioxide Analogues, III1).  -  N-Methyl-N-sulfinylmethanaminium Salts  -  Preparation and Cycloaddition Reactions with Dienes and DiazomethaneN-Sulfinylmethylamine is N-alkylated by oxonium salts. Reaction of the imonium slats (CH3)2)N⊕ = S = O X⊖ (3a and 4) thus prepared with dienes proceeds by 1,4-addition of the N = S group with formation of the thiazinium compounds 6 and 7. Diazomethane reacts with imonium salts 4 to give aziridinium salt 11.
    Notes: N-Sulfinylmethylamin kann mit Oxoniumsalzen am N-Atom alkyliert werden. Die Umsetzung der so dargestellten Imoniumsalze (CH3)2N⊕ S = O X⊖ (3a und 4) mit Dienen erfolgt unter 1,4-Addition der N = S-Gruppierung zu den Thiaziniumverbindungen 6 und 7. Diazomethan reagiert mit dem Imoniumsalz 4 zum Aziridiniumsalz 11.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810111
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  • 6
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, VI. Synthese von Inosaminderivaten (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 224-232 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, VI.  -  Syntheses of Inosamine DerivativesWith trans-6-methoxy-1,3-cyclohexadiene-5,6-diyldiacetate or -5,6-diol inosamine derivatives are synthesized in good yield.
    Notes: Aus trans-6-Methoxy-1,3-cyclohexadien-5,6-diyldiacetat oder -5,6-diol lassen sich in guter Gesamtausbeute Inosaminderivate synthetisieren.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810206
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  • 7
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, VII Synthese von Konduramin-F1 (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 610-611 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, VII1).  -  Synthesis of Conduramine-F1A two-step synthesis of conduramine-F1 with trans-1,3-cyclohexadien-5,6-diyldiacetat (1) as educt is described.
    Notes: Eine zweistufige Synthese von Konduramin-F1, ausgehend von trans-1,3-Cyclohexadien-5,6-diyldiacetat (1), wd beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810407
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  • 8
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, IX. trans-6-Azido-1,3-cyclohexadien-5-ol als Edukt bei der Synthese von Kondurdiamin- und Streptaminisomeren (1984)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 203-212 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polyhydroxyamino Compounds via Diene Synthesis with Nitroso compounds, IX.  -  trans-6-Azido-1,3-cyclohexadien-5-ol as educt for the Synthesis of Kondurodiamine and Streptamine IsomersThe diaminodideoxykonduritols 8a, 8b, and 9 as well as the analogs 10 and 11 of Streptamine have been synthesized starting with O,N-5,6-disubstituted cyclohexadienes.
    Notes: Die Diaminodidesoxykondurite 8a, 8b und 9 sowie die Streptaminanalogen 10 und 11 werden ausgehend von O,N-5,6-disubstituierten Cyclohexadienen synthetisiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198419840202
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  • 9
    Electronic Resource
    Electronic Resource
    Polyhydroxyamine via Diensynthese mit Nitrosoverbindungen, VIII. Darstellung von Diaminoderivaten über Epoxide (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 1874-1879 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Poylhydroxyamino Compounds via Diene Synthesis with Nitroso Compounds, VIII1).  -  Preparation of Diamino Derivatives via EpoxidesThe epoxidation of the aminocyclohexenols 1 proceeds specifically with syn-attack and formation of the epoxides 2. Reactions of 2 with ammonia or dimethylamine leads to the inosdiamines 3 or 4, respectively.
    Notes: Die Epoxidierung der Aminocyclohexenole 1 erfolgt spezifisch unter syn-Angriff, es werden die Epoxide 2 gebildet. Umsetzung von 2 mit Ammoniak oder Dimethylamin führt zu Inosdiaminderivaten 3 bzw. 4.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119811014
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  • 10
    Electronic Resource
    Electronic Resource
    Chemie reaktiver Kationen von Schwefeldioxidanalogen, IX. Umsetzung mit aliphatischen Carbodiimiden (1984)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 900-903 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Reactive Cations Derived from Sulfur Dioxide Analogues, IX. - Reactions with Aliphatic CarbodiimidesN-Methyl-N-sulfinylmethanaminium-tetrafluoroborat (2) yields with aliphatic carbodiimides (1) 1,2,4-thiadiazetium salts (3).
    Notes: N-Methyl-N-sulfinylmethanaminium-tetrafluoroborat (2) reagiert mit aliphatischen Carbodiimiden (1) zu 1,2,4-Thiadiazetiumsalzen (3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198419840508
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