Ring-Opening Ringn-Closure of 4-Phenyl-1,2-Dithiole-3-Thione. Novel Synthesis of Thio-Pyrano[2,3-B]Pyrane Derivatives

Ring-Opening Ringn-Closure of 4-Phenyl-1,2-Dithiole-3-Thione. Novel Synthesis of Thio-Pyrano[2,3-B]Pyrane Derivatives

1,2-Dithiole-3-thione (1) react with a number of selected α, β-unsaturated nitriles to give thiopyrano(2,3-b]pyrane (3 a,b) and/or pyridine (3c) derivatives in excellent yields. The products result from a ring-opening ring-closure reaction and a concomitant nucleophilic attack at the 5-position of t...

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Veröffentlicht in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2000-02, Vol.165 (1), p.1-6
Hauptverfasser: Barsy, Magda A., Latif, Fawi M. Abd El, Ahmed, S. M., El-maghraby, M. A.
Format: Artikel
Sprache:eng
Schlagworte:
1,2-dithiole-3-thione
Thiopyrano(2,3-b]pyrane (pyridine)
α, β-unsaturated nitriles
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Zusammenfassung:1,2-Dithiole-3-thione (1) react with a number of selected α, β-unsaturated nitriles to give thiopyrano(2,3-b]pyrane (3 a,b) and/or pyridine (3c) derivatives in excellent yields. The products result from a ring-opening ring-closure reaction and a concomitant nucleophilic attack at the 5-position of the dithiole ring.
ISSN:1042-6507
1563-5325
DOI:10.1080/10426500008076320