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- W2025831220 abstract "Das aus der Titelverbindung 1 basenkatalysiert gebildete Azomethin-imin 2 kann durch Dipolarophile abgefangen werden. So gibt Fumarsäure-dimethylester die Pyrazolidine 4a und b, Maleinsäure-dimethylester daneben auch 4c und d. Die Stereochemie der Addukte wird durch chemische Reaktionen, NMR-Spektren und — im Falle von 4b — Kristallstrukturanalyse aufgeklärt. Acrylonitril und Fumaronitril verhalten sich ähnlich. Enehydrazines, 24. Pyrazolidines from Cycloadditions with the Azomethine Imine of Dimethyl 2-(1-Methylhydrazino)-maleate The azomethine imine 2 which is formed base-catalyzed from the title compound 1 can be trapped by dipolarophiles. Thus dimethyl fumarate gives the pyrazolidines 4a und b, dimethyl maleate additionally 4c and d. The stereochemistry of the adducts is elucidated by chemical reactions, NMR spectra and — in the case of 4b — crystal structure analysis. Acrylonitrile and fumaronitrile behave similarly." @default.
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- W2025831220 date "1979-05-01" @default.
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- W2025831220 title "Enhydrazine, 24. Pyrazolidine durch Cycloadditionen mit dem Azomethin‐imin aus 2‐(1‐Methylhydrazino)maleinsäure‐dimethylester" @default.
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- W2025831220 doi "https://doi.org/10.1002/cber.19791120522" @default.
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