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 Найдено в других БД:Публикации Чарушина В.Н. (3)
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Общее количество найденных документов : 19
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 1-10    11-19 
1.
Инвентарный номер: нет.
   
   R 30


   
    Reaction of 2-polyfluoroacylcyclohexanones with semicarbazides [Electronic resource] / K. I. Pashkevich, D. V. Sevenard, O. G. Khomutov, O. V. Shishkin, E. V. Solomovich // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1999. - Vol. 48, N 2. - P359-363
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1999, 48 (2), 359-363.pdf
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2.
Инвентарный номер: нет.
   
   P 80


   
    Polyfunctional Fluoroalkyl Carbonyl Compounds as Building Blocks for Synthesis of Heterocycles [Text] : доклад, тезисы доклада / K. I. Pashkevich, V. I. Filyakova, V. G. Ratner, O. G. Khomutov, O. A. Kuznetsova, D. V. Sevenard // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P107
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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3.
Инвентарный номер: нет.
   
   S 51


    Sevenard, D. V.
    Interaction of 2-polyfluoroalkyl Cyclalkanones with Hydroxylamine and Hydrazines [Text] : доклад, тезисы доклада / D. V. Sevenard, O. G. Khomutov, K. I. Pashkevich // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P119
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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4.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of trifluoroalkyl- and fluoroaryl-substituted 4,5-dihydro-1H-1,2,4-triazole-5-thiones [Electronic resource] / E. B. Vasil'eva, D. V. Sevenard, O. G. Khomutov, O. A. Kuznetsova, N. S. Karpenko, V. I. Filyakova // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2004. - Vol. 40, № 6. - P874-878. - Библиогр. : с. 878 (8 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of 4-(4-fluorophenyl)-, 4-(4-trifluoromethoxyphenyl)-, 4-(3,4-difluorophenyl)-, 4-(4-trifluoromethylphenyl)-, 4-piperidino-, and 4-(3-pyridyl)thiosemicarbazides with esters gave the corresponding 3,4-disubstituted 4,5-dihydro-1H-1,2,4-triazole-5-thiones and their S-alkyl derivatives. Analogous reactions with methyl 2,2,3,3,4,4,5,5-octafluoropentanoate and 2,2,3,3,4,4,5,5-octafluoropentanenitrile afforded, respectively, the acylation and addition products.

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2004, 40 (6), 874.pdf
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5.
Инвентарный номер: нет.
   
   A 77


   
    Aromatization via a dibromination-double dehydrobromination sequence: a facile and convenient synthetic route to 2,6-bis(trifluoroacetyl)phenols [Text] / D. V. Sevenard, O. Kazakova, R. -M. Schoth, E. Lork, D. L. Chizhov, J. Poveleit, G. -V. Roeschenthaler // Synthesis. - 2008. - № 12. - P1867-1878
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\expert2\\nbo\\Synthesis\\2008, № 12. р.1867.pdf
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6.
Инвентарный номер: нет.
   
   T 44


   
    The structure of 4-phenyl-2,6-bis(trifluoroacetyl)cyclohexanone and its dilithium salt in the crystal state, solution and gas phase [Electronic resource] / D. V. Sevenard, O. Kazakova, E. Lork, T. Duelcks, D. L. Chizhov, G. -V. Roeschenthaler // Journal of Molecular Structure. - 2007. - Vol. 846, № 1-3. - P87-96
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 4-Phenyl-2,6-bis(trifluoroacetyl)cyclohexanone and its dilithium salt were synthesized starting from the commercially available 4-phenylcyclohexanone. With X-ray structure analysis of these compounds, for the first time the solid state structure determination for a fluorinated 1,3,5-triketone and an alkaline salt of 1,3,5-triketone was achieved. The subsequent multinuclear NMR and MS investigations revealed that in solution and gas phase, analogously to the crystal, both compounds exist predominantly in a highly delocalized double U-enol(ate) form. The carbonyl O…O distances in the dilithium salt were established to be considerably longer than the distances between oxygens of the parent 1,3,5-triketone, bonded by strong (short) resonance assisted hydrogen bonds. Among the 1,3,5-tricarbonyl compounds with known crystal structure, the entitled 1,3,5-triketone shows comparatively weak delocalization over the conjugated bis-enolone backbone.

\\\\Expert2\\nbo\\Journal of Molecular Structure\\2007, v.846, p.87.pdf
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7.
Инвентарный номер: нет.
   
   H 19


   
    Halogenation of fluorinated 1,3,5-triketones [Text] / D. V. Sevenard, O. Kazakova, D. L. Chizhov, D. S. Yachevskii, E. Lork, J. Poveleit, V. N. Charushin, G. -V. Roeschenthaler // Helvetica Chimica Acta. - 2007. - Vol. 90, № 2. - P369-384. - Библиогр. : с. 384 (17 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The behavior of linear and cyclic fluorinated 1,3,5-triketones and their metal derivatives towards common halogenating agents was examined, and optimal reaction conditions for the straightforward synthesis of mono-, di-, and tetrahalogenated products were found (Schemes 1-3). An aromatization through a double HBr elimination from an ,-dibrominated cyclohexanone was shown to be a promising synthetic route to 1,1-(2-hydroxy-1,3-phenylene)bis[2,2,2-trifluoroethanones] (= 2,6-bis(trifluoroacetyl)phenols; Scheme 4). Additionally, the 1,3,5-triketones prepared add readily H2O or alcohols to produce novel bridged 2,6-dihydroxypyran-4-ones (Scheme 2). The structure of the obtained compounds 6a and 7a was confirmed by X-ray structure analysis.

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8.
Инвентарный номер: нет.
   
   F 70


   
    Fluorinated Pd(II)-1,3,5-triketonates: synthesis and molecular structure [Text] / D. L. Chizhov, D. V. Sevenard, E. Lork, K. I. Pashkevich, G. -V. Roeschenthaler // Journal of Fluorine Chemistry. - 2004. - Vol. 125, № 7. - P1137-1141 : ил. - Библиогр.: с. 1141 (20 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
POLYFLUOROALKYLATED 1,3,5-TRIKETONES -- 2-PERFLUOROHEPTANOYL CYCLOHEXANONE -- MONONUCLEAR PD(II) TRIKETONATES -- ENOLIZATION -- MOLECULAR STRUCTURE -- X-RAY ANALYSIS
Аннотация: Several new mononuclear complexes of Pd(II) have been prepared from perfluorobutyl substituted 1,3,5-triketones (containing linear and carbocycle backbones) and perfluoroheptanoyl cyclohexanone. 1,3-Diketones formed a mixture of trans- and cis-forms, whereas 1,3,5-triketones gave trans-complexes exclusively. The enolization of the non-bonded carbonyls in this case depends on the nature of substituents at positions 2 and 4 of the 1,3,5-triketone moiety. The molecular structure of one triketonate complex was confirmed by X-ray single crystal investigation.????

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2004, v.125, p.1137.pdf
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9.
Инвентарный номер: нет.
   
   S 98


   
    Syntheses of novel 4-polyfluoroalkyl-substituted 5,6-oligomethylene pyrimidines [Text] / D. V. Sevenard, O. G. Khomutov, O. V. Koryakova, V. V. Sattarova, M. I. Kodess, J. Stelten, I. Loop, E. Lork, K. I. Pashkevich, G. -V. Roeschenthaler // Synthesis. - 2000. - № 12. - P1738-1748
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 2-Acylcycloalkanones having polyfluoroalkyl groups react with guanidine, urea, thiourea, methylisothiourea, benzamidine, guanylthiourea, dicyanodiamide, and trifluoroacetylurea by Lewis-acid catalysis to form the corresponding 5,6-oligomethylene pyrimidines. A decrease in the yields along with increase of polyflyoroalkyl substituent length in the molecule of the starting 1,3-diketone was observed in the case of reagents with lower nucleophilicity (urea, thiourea, dicyanodiamide). The pyrimidines obtained from aromatic aldehydes showed E-configuration with respect to the arylidene double bond. Tautomeric structures as a function of the substituent in 2 position in the pyrimidine ring both in liquid and solid state were investigated by X-ray diffraction, IR and NMR spectroscopy.

\\\\expert2\\nbo\\Synthesis\\2000, № 12. p.1738.pdf
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10.
Инвентарный номер: нет.
   
   N 89


   
    Novel polyfluoroalkylated pyrazoles from 2-polyfluoroacylcycloalkanones and hydrazines: Syntheses and unequivocal molecular structure assignment [Text] / D. V. Sevenard, O. G. Khomutov, M. I. Kodess, K. I. Pashkevich, I. Loop, E. Lork, G. -V. Roeschenthaler // Canadian Journal of Chemistry. - 2001. - Vol. 79, № 2. - P183-194
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDRAZINES -- MOLECULAR STRUCTURE -- ISOMERIC PYRAZOLES;
Аннотация: The reaction between 2-trifluoroacetylcycloalkanones and methylhydrazine or phenylhydrazine exclusively yields 3-CF3-pyrazoles. When the chain length of the polyfluorinated substituent in RFC(O) group increases, 5-RF-pyrazoles are isolated. The reaction of 2-trifluoroacetylcyclohexanone with 2-hydrazinopyradine gives 5-hydroxypyrazoline, an intermediate in the formation of 5-CF3-pyrazoles. The regiochemistry of the condensation is probably controlled by the nucleophilicity of the terminal nitrogen in the mono substituted hydrazines and by the steric requirements of the RF group in the 1,3-diketones. Polymethylene chain containing pyrazoles obtained from the 1,3-diketones in question and hydrazine prefer the 3-RF tautomeric form, irrespective of carbocyclic ring size and polyfluoroalkyl group chain length.

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