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V. I. Ovcharenko S. V. Fokin G. V. Romanenko V. N. Ikorskii R. Z. Sagdeev D. S. Yachevskii D. L. Chizhov V. N. Charushin 《Russian Chemical Bulletin》2006,55(11):1904-1908
Heterospin complexes of bis(μ2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) ([Cu2L2]) with nitronyl nitroxides 2-(1-methyl-1H-pyrazol-4-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide (2) and 4,4,5,5-tetramethyl-2-(3-pyridinyl)-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide (1) were synthesized and structurally characterized. Crystals of the complexes are formed by the discrete bis[1-methyl-4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)-1H-pyrazole]-bis (μ2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) etherate (3) and bis[3-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyridine]-bis (μ2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) (4) molecules. Each Cu atom of the dinuclear chelate fragment coordinates one paramagnetic ligand through the N atom of the
pyrazole or pyridine fragment, respectively. In complex 3, the paramagnetic ligands are located on one side of the plane of the chelate fragment, whereas the ligands in complex 4 are located above and below the plane of the chelate fragment. The magnetic properties of complexes 3 and 4 are determined by dominant antiferromagnetic exchange interactions between the unpaired electrons of the CuII atoms in the dinuclear Cu2L2 moiety.
Dedicated to Academician O. M. Nefedov on the occasion of his 75th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1836–1840, November, 2006. 相似文献
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Sosnovskikh VY Korotaev VY Chizhov DL Kutyashev IB Yachevskii DS Kazheva ON Dyachenko OA Charushin VN 《The Journal of organic chemistry》2006,71(12):4538-4543
Polyhaloalkyl-substituted chromones, gamma-pyrones, and beta-furanones react with salicylaldehydes in the presence of piperidine to give a wide variety of fused 2H-chromenes in good yields. This novel annulation reaction presumably proceeds by a tandem intermolecular oxa-Michael addition and subsequent intramolecular Mannich condensation. 相似文献
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Dmitri V. Sevenard Olesya Kazakova Dmitri L. Chizhov Danil S. Yachevskii Enno Lork Jörn Poveleit Valery N. Charushin Gerd‐Volker Röschenthaler 《Helvetica chimica acta》2007,90(2):369-384
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 α,α′‐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. 相似文献
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Yachevskii D. S. Chizhov D. L. Rusinov G. L. Charushin V. N. 《Russian Journal of Organic Chemistry》2019,55(6):894-896
Russian Journal of Organic Chemistry - Previously unknown 4-(polyfluoroacylmethyl)-substituted pyrimidines were synthesized by reaction of 1,5-bis(polyfluoroalkyl)-1,3,5-triketones with amidines. 相似文献
6.
E. G. Mkrtchyan D. S. Yachevskii D. L. Chizhov V. N. Charushin 《Russian Chemical Bulletin》2005,54(9):2150-2156
Reactions of perfluoroalkyl-containing aliphatic 1,3-diketones with triethyl orthoformate afforded a number of β-ethoxy enones.
Their reactions with o-phenylenediamine gave novel perfluoroalkyl-containing tridentate β-amino enones and tetradentate bis(β-amino enones) in high
yields.
Dedicated to Academician N. S. Zefirov on the occasion of his 70th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2086–2092, September, 2005. 相似文献
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R. I. Ishmetova D. S. Yachevskii N. K. Ignatenko P. A. Slepukhin I. V. Efimov V. A. Bakulev G. L. Rusinov V. I. Filyakova V. N. Charushin 《Russian Chemical Bulletin》2016,65(5):1268-1271
The N(1)—N(1), N(2)—N(2), and N(1)—N(2) regioisomers of 1,2-bis[(prop-2-yn-1-yl)-1H-tetrazol-5-yl]ethane were first synthesized by alkylation of 1,2-bis(1H-tetrazol-5-yl)ethane with propargyl bromide. The peculiarities of the crystal structure of 1,2-bis[1-(prop-2-yn-1-yl)-1H-tetrazol-5-yl]ethane were evaluated by X-ray diffraction analysis. This compound is readily underwent Cu-catalyzed [3+2] cycloaddition with p-tolyl azide, p-nitrophenyl azide, and benzyl azide to give heterocyclic assembles bearing 1,2,3-triazole and tetrazole cycles. Catalyst-free [3+2] cycloadditions of 1,2-bis[1-(prop-2-yn-1-yl)-1H-tetrazol-5-yl]ethane and the mixtures of the N(1)—N(1), N(2)—N(2), N(1)—N(2) regioisomers with poly(glycidyl azide) oligomers resulted in 1,2,3-triazole cycles and crosslinking of the polymer chains. 相似文献
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Yachevskii D. S. Chizhov D. L. Ratner V. G. Pashkevich K. I. 《Russian Chemical Bulletin》2001,50(7):1233-1237
A preparative procedure was developed for the synthesis of polyfluoroalkyl-1,3,5-triketones by condensation of acetone or fluorinated methyl -diketones with methyl perfluorocarboxylates in the presence of LiH. In the case of CF3 substituents, the formation of triketone was accompanied by the formation of its cyclic hydrate, viz., of dihydroxytetrahydropyranone. 相似文献
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Danil S. Yachevskii Dmitry L. Chizhov Mikhail I. Kodess Kazimir I. Pashkevich 《Monatshefte für Chemie / Chemical Monthly》2004,16(4):23-30
The reaction of bis(polyfluoroalkyl)-containing 1,3,5-triketones with o-phenylenediamine yielded 2-polyfluoroacylmethylene-4-polyfluoroalkyl-1,3- or 1,5-dihydro-1,5-benzodiazepines. The tautomeric equilibrium of the obtained benzodiazepines in CDCl3, CD3CN, DMSO, and DMF solution was studied. 相似文献
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V. I. Ovcharenko S. V. Fokin G. V. Romanenko A. S. Bogomyakov D. S. Yachevskii D. L. Chizhov V. N. Charushin O. N. Chupakhin 《Russian Chemical Bulletin》2010,59(6):1162-1174
Dinuclear heterospin complexes of CuII and MnII 1,1,1,7,7,7-hexafluoroheptane-2,4,6-trionates ([Cu2L2] and [Mn2L2], respectively) with nitronyl nitroxides 2-R-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide 1-oxyls (NIT-R, R = H, Me, Et, m-C5H4N, m-NCC6H4, p-NCC6H4, PzMe) and the diradical NIT-Pz-(CH2)4-Pz-NIT (Pz is 1,4-pyrazolylene) were synthesized and structurally characterized. In the complexes under study, the CuII atom
tends to have the square-pyramidal coordination environment, and the MnII atom is in an octahedral environment. The magnetochemical
investigation of the compounds in the temperature range of 2–300 K showed that the antiferromagnetic exchange coupling dominates
in the [Cu2L2] molecules, whereas this coupling in [Mn2L2] is manifested in the experimental plot μeff(T) at T < 100 K. The magnetic properties of the heterospin complexes of [Cu2L2] with NIT-R are also determined by the intramatrix antiferromagnetic exchange coupling. For the complexes of [Mn2L2] with NIT-R, the coordination mode of the nitroxide plays a decisive role. 相似文献