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- W1994657224 abstract "Coupling of diazotized 2-aminopyridine-1-oxide with ethyl cyanoacetylcarbamate, cyanoacetamide, malononitrile, and 2-benzimidazolylacetonitrile in an acid medium afforded N-oxides of the corresponding 2-pyridylhydrazones Ia-Id , which also exist in the N-hydroxyazine tautomeric forms IIa-IId as confirmed by IR spectroscopy. Hydrazone Ia was thermally cyclized to give 2-(pyridine-1-oxide-2-yl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbonitrile ( IIIa ) which was converted into the corresponding thioamide IIIb , acid IIIc , and amidoxime IIId ." @default.
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- W1994657224 date "1988-01-01" @default.
- W1994657224 modified "2023-10-03" @default.
- W1994657224 title "Synthesis and cyclization of some N-oxides of 2-pyridylhydrazones of mesoxalic acid derivatives" @default.
- W1994657224 doi "https://doi.org/10.1135/cccc19880626" @default.
- W1994657224 hasPublicationYear "1988" @default.
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