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- W2034885750 abstract "Aus der Reaktion des 2-Nitro-fluorens (II) mit s-Triazin (I) in Gegenwart von Piperidin (V) geht als Endprodukt das (2-Nitro-fluorenyliden)-formamino-methan (VII) hervor. Unter schonenden Reaktionsbedingungen läßt sich hierbei als Zwischenprodukt das (2-Nitro-fluorenyliden)-piperidino-formimidoyl-methan (VI) isolieren. VII läßt sich als (2-Nitro-fluorenyliden)-benzamino-methan (VIII) charakterisieren. In Anwesenheit von Piperazin (IX) kann die Aminomethinylierung durch I zu Produkten führen, in denen beide N-Atome in IX substituiert sind (X, XII, XVIII). Hingegen lassen sich Enamine (XIV), die nur an einem N-Atom von IX substituiert sind, durch Spaltung von Bis-Enaminen (XIII) mittels IX gewinnen. The Influence of the Nitro Group on Active Methylene Compounds in the Aminomethinylation Reaction The reaction between 2-nitro-fluorene (II) with s-triazine (I) in the presence of piperidine (V) yields (2-nitro-fluorenylidene)-formamino-methane (VII). Under milder reaction conditions (2-nitro-fluorenylidene)-piperidinoformimidoyl-methane (VI) may be isolated as intermediate product. VII may be characterized as (2-nitro-fluorenylidene)-benzamino-methane (VIII). In the presence of piperazine (IX) the aminomethinylation effected by I may lead to products in which both N atoms of IX are substituted (X, XII, XVIII). On the other hand, enamines (XIV) substituted only at one N atom of IX may be obtained through cleavage of bis-enamines (XIII) by means of IX." @default.
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- W2034885750 date "1970-01-01" @default.
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- W2034885750 title "Die Beeinflussung aktiver Methylenverbindungen durch die Nitrogruppe bei der Aminomethinylierung" @default.
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- W2034885750 doi "https://doi.org/10.1002/ardp.19703030203" @default.
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