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  • 1980-1984  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XVIII. Reaktion von Ethoxy(thiocarbonyl)-isocyanat mit Aldehyden und Ketonen zu 1,3,5-Oxathiazinonen (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 3063-3068 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioacyl Isocyanates, XVIII. Reaction of Ethoxy(thiocarbonyl) Isocyanate with Aldehydes and Ketones to 1,3,5-Oxathiazinones[4 + 2]-Cycloaddition of ethoxy(thiocarbonyl) isocyanate with aldehydes and some ketones affords the oxathiazinones 3. α,β-Unsaturated aldehydes react in the same way, that means with maintenance of their multiple CC-bond. These facts differentiate the thioacyl isocyanates from acyl isocyanates as well as from unpolar dienes.
    Notes: Ethoxy(thiocarbonyl)-isocyanat addiert nach dem [4 + 2]-Prinzip Aldehyde und manche Ketone zu den Oxathiazinonen 3. Auch α,β-ungesättigte Aldehyde reagieren entsprechend, d. h. unter Erhaltung ihrer CC-Mehrfachbindung. Diese Verhaltensweisen unterscheiden die Thioacyl-isocyanate charakteristisch sowohl von Acyl-isocyanaten als auch von unpolaren Dienen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150912
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  • 2
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XVII. Reaktion des Ethoxy(thiocarbonyl)-isocyanats mit Vinylethern (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 1259-1264 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioacyl Isocyanates, XVII. Reaction of Ethoxy(thiocarbonyl) Isocyanate with Vinyl EthersEthoxy(thiocarbonyl) isocyanate (5) reacts with linear and cyclic vinyl ethers to give dihydro-1,3-thiazinones (1, 3, 6, 8) besides unsaturated carboxamides (2, 4, 7, 9). In some cases β-lactams in low concentrations probably originated (spectroscopy). The cycloaddition occurred regiospecifically according to the polarity; it afforded with dihydropyran the bicyclic compound 6 with cis-bonded rings.
    Notes: Offenkettige und cyclische Vinylether ergaben mit Ethoxy(thiocarbonyl)-isocyanat (5) nebeneinander Dihydro-1,3-thiazinone (1, 3, 6, 8) und ungesättigte Carboxamide (2, 4, 7, 9). Spektroskopisch machte man in einigen Fällen β-Lactame in geringer Konzentration wahrscheinlich. Die Cycloaddition erfolgte regiospezifisch nach der vorgegebenen Polarität; sie ergab mit Dihydropyran den Bicyclus 6 mit cis-verknüpften Ringen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150402
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  • 3
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XVI. Zur Kenntnis des Ethoxy(thiocarbonyl)-isocyanats (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 1252-1255 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thioacyl Isocyanates, XVI. To the Knowledge of Ethoxy(thiocarbonyl) IsocyanateEthoxy(thiocarbonyl) isocyanate (2), a thermically rather stable compound, is prepared by a simplified method. It dimerizes easily to 3, which itself is a good starting material for the monomer compound 2. The ratio between monomer and dimer (nitrobenzene, 93°C) and the reaction with some nucleophiles (to 6-9) are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150341
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  • 4
    Electronic Resource
    Electronic Resource
    Neue Möglichkeiten der Aldol-Reaktion am Beispiel einfacher Synthesen von PiperinHerrn Prof. Dr. Herbert Grünewald zum 60. Geburtstag gewidmet. (1981)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 1725-1727 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: New Approaches of Aldol-Type Reactions Demonstrated by Simple Syntheses of PiperinePiperine (3) is easily obtained by base-catalysed condensation of piperonal (1) and 1-crotonoyl-piperidine (2).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198119810922
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