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- W2951220121 abstract "Reaction of cyanoacetohydrazones 3a,b with a variety of arylidenemalononitriles 5a - c under the effect of piperidine basic catalysis afforded exclusively the corresponding 6-amino-1,2-dihydro-1,4- disubstituted-2-oxo-3,5-pyridinedicarbonitriles 6a - f in high regioselectivity. A chemical confirmation for the proposed structure was achieved through the reaction of ylidenes 8 with malononitrile under basic conditions, which yielded the corresponding 6 accompanied with 3. Refluxing 3b in acetic anhydride gave 2-acetyl-3-cyanomethyl-4,5-dihydro-2H-benz[g]indazole (10) as the only isolable product. Single crystal X-ray diffraction of 6e and 10 add conclusive support for the established structures." @default.
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- W2951220121 date "2003-07-01" @default.
- W2951220121 modified "2023-09-26" @default.
- W2951220121 title "A Convenient Regioselective Synthesis of 6-Amino-2-oxo-3,5-pyridinedicarbonitriles" @default.
- W2951220121 doi "https://doi.org/10.1515/znb-2003-0712" @default.
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