Durch Thionierung der Piperidindione (I) und (IV), des Tetrahydropyridindions (VII) und der Succinimide (IX) und (XI) mit Phosphorpentasulfid in Dioxan bzw. Xylol werden in Abhängigkeit von der Reaktionsdauer die in den Formeln wiedergegebe: nen Mono‐ und/ oder Dithioverbindungen erhalten.
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