4-hydroxy-2-quinolones. 114. Synthesis and structure of 6-R-5-hydroxy-2,4-dioxo-2,3,4,6-tetrahydrobenzo-[<Emphasis Type="Italic">c</Emphasis>][2,7]naphthyridine-1-carbonitriles |
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| Authors: | I V Ukrainets N L Bereznyakova V A Parshikov S V Shishkina |
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| Institution: | (1) National University of Pharmacy, Kharkiv, 61002, Ukraine;(2) Institute of Scintillation Materials, National Academy of Sciences of Ukraine, Kharkiv, 61001 |
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| Abstract: | Hydration of ethyl 1-R-4-dicyanomethyl-2-oxo-1,2-dihydroquinoline-3-carboxylate gives the corresponding substituted cyanoacetamides
which are readily and quantitatively cyclized to 6-R-5-hydroxy-2,4-dioxo-2,3,4,6-tetrahydrobenzoc]2,7]naphthyridine-1-carbonitriles
in the presence of aqueous base.
For Communication 113 see 1].
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 726–735, May, 2007. |
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| Keywords: | benzonaphthyridine 4-chloro-3-ethoxycarbonyl-2-quinolinone malononitrile cyanoacetamide hydrolysis X-ray analysis |
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