Das aus dem Bis‐hydrazon (I) und dem Diketon (II) bzw. durch Eigenkondensation von (IV) zugängliche Tetraaza‐Derivat (III) geht direkt in das bicyclische Betain (V) über, das bei der Photolyse in Abhängigkeit von der Wellenlänge zu den Umlagerungs‐ 35 produkten (VI)‐(X) führt.
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