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Общее количество найденных документов : 41
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1.

Вид документа : Статья из журнала
Шифр издания : 54/U 62
Автор(ы) : Boltacheva N. S., Slepukhin P. A., Chizhov D. L., Yachevskii D. S., Filyakova V. I., Charushin V. N.
Заглавие : Unusual transformations of lithium enolate of ethyl 4,4,4-trifluoro-3-oxobutanoate
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2012. - Vol.61, №3. - С. 563-567
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): lithium--enolates--unusual reactions
Аннотация: The present paper describes unusual reactions of lithium enolate of ethyl 4,4,4-trifluoro-3-oxobutanoate with ammonium acetate and 1-aminonaphthalene. These reactions produce 4-amino-2,6-bis(trifluoromethyl)pyridine and 4-trifluoromethyl-2-[(Z)-1,1,1-trifluoroprop-1-en-2-ol-1-yl]benzo[h]quinoline, respectively. The reaction of 1,1,7,7,7-hexafluoroheptane-2,4,6-trione hydrate with 1-naphthylamine gives a mixture of 4-trifluoromethyl-2-[(Z)-1,1,1-trifluoroprop-1-en-2-ol-1-yl]benzo[h]quinoline and N,N′-bis(naphth-1-yl)-2,6-bis(trifluoromethyl)pyridine-4(1H)-imine, respectively
\\\\Expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (3), 563-567.pdf
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2.

Вид документа : Статья из журнала
Шифр издания : 54/T 86
Автор(ы) : Chizhov D. L., Pervova M. G., Samorukova M. A., Khmara E. F., Filyakova V. I., Saloutin V. I., Charushin V. N.
Заглавие : Trialkyl borate assisted amination of fluorinated 1,3-diketones for synthesis of N,N?-1,2-phenylen-bis(beta-aminoenones) and their Ni(II), Cu(II) and Pd(II) complexes
Место публикации : Journal of Fluorine Chemistry. - 2011. - Vol. 132, № 6. - С. 394-401
Примечания : Bibliogr. : p. 401 (19 ref.)
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: An effecient synthetic method for fluorinated tridentate ?-aminoenones and tetradentate bis(?-aminoenones) via amination of fluorinated 1,3-diketones with o-phenylenediamine in the presence of trialkyl borates was developed. Ni(II), Cu(II) and Pd(II) complexes with tetradentate bis(?-aminoenones) were obtained. Their gaschromatographic behaviour and main fragmentation paths in the electron ionization mass spectra were described
\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2011, v. 132, p.394.pdf
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3.

Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Sevenard D. V., Kazakova O., Lork E., Duelcks T., Chizhov D. L., Roeschenthaler G.-V.
Заглавие : The structure of 4-phenyl-2,6-bis(trifluoroacetyl)cyclohexanone and its dilithium salt in the crystal state, solution and gas phase
Место публикации : Journal of Molecular Structure. - 2007. - Vol. 846, № 1-3. - С. 87-96
ББК : 54
Предметные 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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4.

Вид документа : Статья из журнала
Шифр издания : 54/T 44
Автор(ы) : Chizhov D. L., Sosnovskikh V. Ya., Pryadeina M. V., Burgart Ya. V., Saloutin V. I., Charushin V. N.
Заглавие : The first synthesis of 4-unsubstituted 3-(trifluoroacetyl)coumarins by the Knoevenagel condensation of salicylaldehydes with ethyl trifluoroacetoacetate followed by chromene-coumarin recyclization
Место публикации : Synlett. - 2008. - № 2. - С. 281-285
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
\\\\expert2\\nbo\\Synlett\\2008. N 2. P. 281-285.pdf
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5.

Вид документа : Статья из журнала
Шифр издания : 54/T 34
Автор(ы) : Fedin M., Zhilina E. F., Chizhov D. L., Charushin V. N.
Заглавие : Temperature-dependent zero-field splitting in a copper(ii) dimer studied by EPR
Место публикации : Dalton Transactions. - 2013. - Vol. 42, №13. - С. 4513-4521
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): magnetostructural correlations--temperature dependent--magnetic susceptibility
Аннотация: We report on the synthesis and temperature-dependent magnetic properties observed in an exchange-coupled copper(ii) dimer using X/Q-band Electron Paramagnetic Resonance (EPR) spectroscopy (9/34 GHz). It has been found that the zero-field splitting (D) in the dimer changes gradually by a factor close to two in the temperature range from T = 50 to 300 K. X-ray diffraction data show that this dimer consists of two five-coordinated copper ions, one of which has a highly asymmetric geometry intermediate between square pyramid and trigonal bipyramid. The copper-copper distance in the dimer is temperature-independent, whereas the degree of trigonality in an asymmetric unit decreases as the temperature is lowered. Therefore we suppose that the observed dependence D(T) originates from the interplay of different exchange interaction pathways driven by these thermal changes. Magnetic susceptibility measurements reveal weak ferromagnetic interactions, whose anisotropic parts should indeed be very sensitive to the subtle changes in the geometry and may result in apparent D(T). Apart from being a very unusual example of magneto-structural correlations, this and similar dimeric systems can be considered as an interesting type of new materials exhibiting strongly temperature-dependent magnetic p
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6.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Khmara E. F., Chizhov D. L., Sidorov A. A., Aleksandrov G. G., Slepukhin P. A., Tokarev K. L., Charushin V. N.
Заглавие : Synthesis, structure, electrochemical and magnetic properties of 2,6-bis(5-trifluoromethylpyrazol-3-yl)pyridine and its NiII complexes
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2012. - Vol.61, №2. - С. 313-325
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): electrochemistry--nickel complexes--x-ray diffraction analysis
Аннотация: 2,6-Bis(5-trifluoromethylpyrazol-3-yl)pyridine (H2L) and its mono-, tri-, and tetranuclear NiII complexes were synthesized for the first time. All the obtained compounds were characterized by single-crystal X-ray diffraction analysis. In the complexes, 2,6-bis(5-trifluoromethylpyrazol-3-yl) pyridine exists in the neutral and dianionic forms and exhibits different coordination modes (κ3-, μ2-κ3: κ1-, and μ3-κ3: κ1:κ1). The electrochemical and magnetic properties of all compounds were studied. The tetranuclear NiII complex with the L2- dianion is reduced in two sequential reversible one-electron steps
\\\\Expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (2), 313-325.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Zhilina E. F., Slepukhin P. A., Boltacheva N. S., Pervova M. G., Chizhov D. L., Filyakova V. I., Charushin V. N.
Заглавие : Synthesis, structure and complexation of the fluorinated 1,3-enaminoketones containing at the nitrogen atom substituents with a terminal C≡C bond
Место публикации : Russian Journal of General Chemistry. - 2012. - Vol. 82, №12. - С. 1962-1969
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): synthesis--nitrogen--terminal c≡c bonds
Аннотация: The reaction of fluorinated lithium 1,3-diketonates with propargylamine hydrochloride and 1,1,1-trifluorpentane-2,4-dione or 1,1,1-trifluoro-4-methoxypent-3-en-2-one with propargylamine and 3-aminophenylacetylene were performed to obtain fluorinated 1,3-enaminones containing at a nitrogen atom substituents with terminal C≡C bonds: (Z)-1,1,1-trifluoro-4-(2-propynylamino)-3-pentene-2-one, (Z)-1,1,2,2-tetrafluoro-5-(2-propynylamino)-4-hexen-3-one, and 4-(3-ethynylphenylamino)-1,1,1-trifluoropentyl-3-en-2-one. Reactions of 4-(3-ethynyl-phenylamino)-1,1,1-trifluoro-pentyl-3-en-2-one with Cu(II) acetate or nanosized powder of copper or its oxides led to the respective chelate complex. The structure of (Z)-1,1,2,2-tetrafluoro-5-(2-propynylamino)-4-hexen-3-one and a copper complex of 4-(3-etinilphenylamino)-1,1,1-trifluoropenta-3-en-2-one was determined by XRD
\\\\Expert2\\NBO\\Russian Journal of General Chemistry\\2012, V. 82, N 12, p. 1962–1969.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/Y 12
Автор(ы) : Yachevskii D. S., Chizhov D. L., Charushin V. N.
Заглавие : Synthesis of regioisomeric polyfluoroalkylpyrazolo[1,5-a]pyrimidines [Electronic resource]
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2006. - Vol. 42, № 1. - С. 142-144
Систем. требования: http://www.springerlink.com/content/x59313l700443171/fulltext.pdf
Примечания : Библиогр. : с. 144 (3 назв.). - 28.10.2011 г.
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The article discusses a study that illustrates the synthesis of regioisometric polyfluoroalkylpyrazolo[1,5-a]pyramidines in 2 schemes. Polyfluoroalkyl-containing 1,3,5-triketones are convenient and promising reagents for building up various heterocyclic systems. Reactions of triketones as well as their dehydration products are examined.
\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2006, 42 (1), 142.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Nikonov M. V., Chizhov D. L., Ratner V. G., Pashkevich K. I.
Заглавие : Synthesis of polyfluoroalkyl-containing 1,3,5-triketones
Место публикации : Journal of Fluorine Chemistry. - 2000. - Vol. 106, № 2. - С. 115-116
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Synthesis of polyfluoro 1,3,5-triketones by modification of Claisen condensation is described.????
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10.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Mkrtchyan E.G., Yachevskii D. S., Chizhov D. L., Charushin V. N.
Заглавие : Synthesis of perfluoroalkyl-containing tri-and tetradentate beta-amino enones [Electronic resource]
Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 9. - С. 2150-2156
Систем. требования: http://www.springerlink.com/content/rxl37101g0l72774/fulltext.pdf
Примечания : 26.10.2011
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of perfluoroalkyl-containing aliphatic 1,3-diketones with triethyl orthoformate afforded a number of ?-ethoxy enones. Their reactions with o-phenylenediamine gave novel perfluoroalkyl-containing tridentate ?-amino enones and tetradentate bis(?-amino enones) in high yields
\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (9), 2150.pdf
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