Abstract
AbstractDas aus dem Aminomalonsäureester (I) durch Erhitzen auf 160‐180°C unter Stickstoff erhaltene Pyridazindion (II) gibt in Dioxan beim Behandeln mit Natriumhydrid und anschließend mit frisch destilliertem Dischwefeldichlorid das Gemisch aus den Epithia‐Verbindungen (IIIa) (17 %), (IIIb) (9 %) und geringen Mengen von (IIIc) und (IIId).
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