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Synthesis 1985; 1985(11): 1055-1057
DOI: 10.1055/s-1985-31426
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Oxokohlenstoffe und verwandte Verbindungen; 10. Mitteilung. Pseudooxokohlenstoff-Betaine der C4-Reihe mit einer Cyanaminobzw. einer Sulfonylamino-Funktion durch Dreikomponenten-Reaktion

Arthur H. Schmidt* , Monika Straus, Dietmar Botzet
  • *Abteilung für Organische Chemie und Biochemie, Fachhochschule Fresenius, Kapellenstraße 11-15, D-6200 Wiesbaden, Bundesrepublik Deutschland
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Publication Date:
27 September 2002 (online)

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Oxocarbons and Related Compounds; Part 10. Pseudooxocarbon-Betaines of the C4-Series with a Cyanamino Group or a Sulfonylamino Group by Three-Component-Reaction Reaction of squaric dichloride (7) with pyridine and cyanamide or a sulfonamide leads to the cyanamino-pyridinium-betaine 10a and the sulfonylaminopyridinium-betaines 10c-f, respectively. In the same way squaric dichloride (7) reacts with triphenylphosphine and cyanamide to give the cyanaminotriphenylphosphonium-betaine 10b.