- Synthesis and spectral studies of novel nicotinonitrile-based fluorescent dyes
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The synthesis of novel highly efficient fluorescent dyes of 4-amino-2-chloro-6-arylpyridine-3,5-dicarbonitrile series via heterocyclization of aryl(heteryl)methylidene derivatives of malononitrile dimer bearing electron-donor groups was described. Solvatochromic behavior and substituents effect on the spectral-luminescent properties were also investigated. Strong solvatochromism and high relative fluorescence quantum yields up to 0.92 despite the large Stokes shift values and were observed.
- Alekseeva, Anastasiya U.,Bardasov, Ivan N.,Ershov, Oleg V.,Ershova, Anastasiya I.,Ievlev, Mikhail Yu.
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- Synthesis of Some New Polyfunctionalized Pyridines
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5-Methyl-2,4-dihydro-3H-pyrazol-3-one and/or 5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one was reacted with arylidenemalononitrile in the presence of sodium alkoxide to give 2-amino-6-alkoxy-4-arylpyridine-3,5-dicarbonitrile 4a–e instead of the reported pyrazolo[3,4-b]pyridine-5-carbonitriles. The same products 4a–e were prepared via reaction of arylidenemalononitrile with sodium alkoxide in an appropriative alcohol. However, the new synthetic route for preparation of their positional isomer 4-amino-6-alkoxy-2-arylpyridine-3,5-dicarbonitrile 7a–j has been achieved via reaction of 2-aminoprop-1-ene-1,1,3-tricarbonitrile with different aromatic aldehydes under the same conditions.
- Amer
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p. 297 - 301
(2017/11/27)
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- Heterocyclization of michael adducts of β-diketones with arylmethylidene derivatives of malononitrile dimers
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Reaction of arylmethylidene derivatives of malononitrile dimer with 1,3-cyclohexanediones in anhydrous methanol in the presence of sodium methylate as catalyst affords 4-amino-5-aryl-2-methoxy-6-oxo-5,6,7,8,9,10- hexahydrobenzo[b][1,8]naphthyridine-3-carb
- Alekseeva, A. Yu.,Mikhailov,Bardasov,Ershov,Nasakin,Lyshchikov
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p. 244 - 250
(2014/04/17)
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