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- W2159849079 abstract "Umsetzung des Enaminons 2 mit p-Benzochinon (1) führt zum Carbazol 3, das nach Methylierung zu 5b bzw. Acetylierung zu 5a als Synthon für die Titelverbindungen eingesetzt wird. Bei der Reaktion von 5a, b mit Hydroxylamin entstehen die Nitrone 7a, b deren Struktur durch Reduktion zu 9 bzw. 10 und Umlagerung zu 12 und 13 chemisch bewiesen werden kann. Carbazol 5b wird mit Hydrazin zum 1,2,5-Triazepino-carbazol 8a umgesetzt. Seine Struktur wird durch Acetylierung zu 8b und spektroskopisch bewiesen. Synthesis of [1,2,5]-Triazepino[3,4,5-jk]- and Pyrazino[3,2,1-jk]carbazole Derivatives Reaction of the enaminone 2 and p-benzoquinone (1) yields the carbazole 3, which is used as precursor for the title compounds after methylation to 5b or acetylation to 5a. The nitrones 7a, b are formed from 5a, b and hydroxylamine. The structures of 7a, b are proved by reduction to 9 and 10 and rearrangement to 12 and 13. The carbazole 5b reacts with hydrazine to yield the [1,2,5]-triazepinocarbazole 8a. The structure of 8a was determined by acetylation to 8b and spectroscopy." @default.
- W2159849079 created "2016-06-24" @default.
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- W2159849079 date "1987-01-01" @default.
- W2159849079 modified "2023-10-17" @default.
- W2159849079 title "Zur Synthese von [1,2,5]-Triazepino-[3,4,5-jk]- und Pyrazino[3,2,1-jk]carbazol-Derivaten" @default.
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- W2159849079 doi "https://doi.org/10.1002/ardp.19873200803" @default.
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