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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 79-89 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Acylcarbodiimides, III. Preparation and Reactions of (Thiocarbamoyl)carbodiimidesStarting from 1,1,5-trisubstituted dithiobiuretes (1) and with the aid of cyanuric trichloride/triethylamine several (thiocarbamoyl)carbodiimides (2) were prepared and partly isolated. This procedure can be used only in special cases for the preparation of 1,1-dialkyl-5-aryl-dithiobiuretes. Carbodiimides without a bulky substituent (R′) are prone to dimerization. Several dimers 4 were isolated, the structure of them was elucidated. Addition of water, alcohols, and amines afforded the thiocarbamoylureas 5, isoureas 7 and guanidines 6, cycloaddition of different acyl isothiocyanates and of benzoyl isocyanate gave the 1,3,5-thiadiazines 8 and 9.
    Notes: Aus 1,1,5-trisubstituierten Dithiobiureten (1) wurden mit Cyanurchlorid/Triethylamin eine Reihe von (Thiocarbamoyl)carbodiimiden (2) hergestellt und z. T. isoliert. Das Verfahren ist auf 1,1-Dialkyl-5-aryl-dithiobiurete nur begrenzt anwendungsfähig. Carbodiimide 2 ohne sperrigen Rest R′ neigen zur Dimerisierung; mehrere Dimere 4 wurden isoliert und in der Konstitution geklärt. Addition von Wasser, Alkoholen und Aminen lieferte die entsprechenden (Thiocarbamoyl)harnstoffe (5), -isoharnstoffe (7) und -guanidine (6). Cycloaddition von verschiedenartigen Acylisothiocyanaten und von Benzoylisocyanat führten zu den 1,3,5-Thiadiazinen 8 und 9.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 502-507 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of Acylheterocumulenes from Fivemembered Rings with the Aid of PhosphinesElimination of sulfur from derivatives of 1,2,4-dithiazoles, 1,2,4-thiadiazoles, and isothiazoles with the aid of tertiary phosphines (phosphites) afforded thiocarbamoyl isothiocyanates (2a-c), imidoylcarbodiimides (7a-c), and imidoylketene imines (10a-c). They were isolated as monomers or as stable derivatives. By this method two compounds (5c, d) were obtained from 1,2-dithiol-3-thiones in the presence of cyclohexylamine which possibly originate from intermediate thioacyl-thioketenes (4).
    Notes: Die Eliminierung von Schwefel aus Derivaten des 1,2,4-Dithiazols, 1,2,4-Thiadiazols und Isothiazols mit Hilfe von tertiären Phosphinen (Phosphiten) ergab Thiocarbamoyl-isothiocyanate (2a-c). Imidoyl-carbodiimide (7a-c) und -ketenimine (10a-c). Sie wurden teils in Substanz, teils als Folge- oder Abfangprodukte isoliert. Aus zwei 1,2-Dithiol-3-thionen wurden nach dieser Methode in Gegenwart von Cyclohexylamin Verbindungen (5c,d) erhalten. die mit der Intermediärbildung von Thioacyl-thioketenen (4) gedeutet werden können.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1973 (1973), S. 1416-1417 
    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 Xanthane Hydride with Acetic Formic Anhydride5-Amino-1,2,4-dithiazole-3-thione (1, xanthane hydride) reacts with acetic formic anhydride (2) without solvent to give 5-formylamino-1,2,4-dithiazole-3-thione (3), and in pyridine to give a mixture of 3 and 5-acetylamino-1,2,4-dithiazole-3-thione (4).
    Notes: 5-Amino-1,2,4-dithiazol-3-thion (1, Xanthanwasserstoff) reagiert mit Ameisenessigsäureanhydrid (2) ohne Lösungsmittel zu 5-Formylamino-1,2,4-dithiazol-3-thion (3), in Pyridin zu einem Gemisch von 3 und 5-Acetylamino-1,2,4-dithiazol-3-thion (4).
    Type of Medium: Electronic Resource
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