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Общее количество найденных документов : 54
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1.
Инвентарный номер: нет.
   


   
    1,3-Dipolar cycloadditions of nonstabilised azomethine ylides at 3-substituted coumarins: synthesis of 1-benzopyrano[3,4-c]pyrrolidines / V. S. Moshkin, V. Ya. Sosnovskikh, P. A. Slepukhin, Gerd-Volker Röschenthalerc // Mendeleev Communications. - 2012. - Vol.22, №1. - С. 29-31
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
COUMARINS -- AZOMETHINE YLIDES -- PYRROLIDINES
Аннотация: Reaction of 3-substituted coumarins with N-alkyl-α-amino acids and aldehydes proceeds regio- and stereoselectively to give 1-benzopyrano[3,4-c]pyrrolidines as a result of 1,3-dipolar cycloaddition of the intermediate azomethine ylides at the Δ3-bond of the coumarins

\\\\Expert2\\nbo\\Mendeleev Communications\\2012, v.22, p. 29.pdf
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2.
Инвентарный номер: нет.
   
   S 73


    Sosnovskikh, V. Ya.
    2,3-dihidro-2,2-dimethyl-6-trifluoromethyl-4-pyrone as Useful CF3-containing Synthon [Text] : доклад, тезисы доклада / V. Ya. Sosnovskikh, M. Yu. Mel'nikov, Yu. G. Yatluk // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P94
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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3.
Инвентарный номер: нет.
   
   S 73


    Sosnovskikh, V. Ya.
    2-Polyfluoroalkylchromones. 12. Nitration of 5,7-dimethyl-2-polyhaloalkylchromones and complete assignment of signals in the 1H and 13C NMR spectra of 5,7-dimethyl-2-trifluoromethylchromone and its mono- and dinitro derivatives [Electronic resource] / V. Ya. Sosnovskikh, B. I. Usachev, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2002. - Vol. 51, № 10. - P1817-1828
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The nitration of 5,7-dimethyl-2-polyhaloalkylchromones affords either 5,7-dimethyl-6-nitro- or 5,7-dimethyl-6,8-dinitro-2-polyhaloalkylchromones, depending on the reaction conditions. Signals in the 1H and 13C NMR spectra of the sterically hindered chromones were completely assigned using the 2D NOESY, HETCOR, and COLOC spectra. The influence of nonplanar nitro groups on chemical shifts of carbon atoms was studied. Some spectral peculiarities of the peri-methyl group were revealed. The 1H-1H and 13C-1H spin-spin coupling constants, including the extreme six-bond long-range coupling between the protons of the Me(5) group and H(8), were determined

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2002, 51 (10), 1817.pdf
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4.
Инвентарный номер: нет.
   
   S 73


    Sosnovskikh, V. Ya.
    A reinvestigation of the reactions of 3-substituted chromones with hydroxylamine. Unexpected synthesis of 3-amino-4H-chromeno[3,4-d]isoxazol-4-one and 3-(diaminomethylene)chroman-2,4-dione [Text] / V. Ya. Sosnovskikh, V. S. Moshkin, M. I. Kodess // Tetrahedron Letters. - 2008. - Vol. 49, № 48. - P6856-6859
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of 3-substituted chromones (3-formylchromone, 3-formylchromone-3-oxime, and 3-cyanochromone) with hydroxylamine in alkaline medium were reinvestigated, and a proof of structures and a probable reaction pathway are presented. Syntheses of 2-aminochromone-3-carboxamide, 3-amino-4H-chromeno[3,4-d]isoxazol-4-one, and 3-(diaminomethylene)chroman-2,4-dione were developed

\\\\Expert2\\nbo\\Tetrahedron Letters\\2008, v. 49, p.6856.pdf
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5.
Инвентарный номер: нет.
   
   A 10


   
    A simple and convenient synthesis of 4-methyl-3-nitro-2-trihalomethyl-2H-chromenes from N-unsubstituted imines of 2-hydroxyacetophenones and trichloro(trifluoro)ethylidene nitromethanes [Text] / V. Yu. Korotaev, V. Ya. Sosnovskikh, I. B. Kutyashev, A. Yu. Barkov, E. G. Matochkina, M. I. Kodess // Tetrahedron. - 2008. - Vol. 64, № 22. - P5055-5060
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reaction of N-unsubstituted imines of 2-hydroxyacetophenones with trichloro(trifluoro)ethylidene nitromethanes in the presence of DABCO proceeds via tandem oxa-Michael/aza-Henry additions (in dichloromethane) or aza-Michael addition (in benzene) to give 4-methyl-3-nitro-2-trichloro(trifluoro)methyl-2H-chromenes or 1,1,1-trichloro(trifluoro)-3-nitro-N-[1-(2-hydroxyaryl)ethylidene]propan-2-amines, respectively????

\\\\Expert2\\nbo\\Tetrahedron\\2008, v. 64, N22, p. 5050.pdf
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6.
Инвентарный номер: нет.
   
   A 10


   
    A simple synthesis of the pentacyclic lamellarin skeleton from 3-nitro-2-(trifluoromethyl)-2H-chromenes and 1-methyl(benzyl)-3,4-dihydroisoquinolines / V. Yu. Korotaev, V. Ya. Sosnovskikh, A. Yu. Barkov, P. A. Slepukhin, M. A. Ezhikova, M. I. Kodess, Yu. V. Shklyaev // Tetrahedron. - 2011. - Vol. 67, № 45. - С. 8685-8698
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
LAMELLARIN ALKALOIDS -- ISOQUINOLINE DERIVATIVES -- HETEROCYCLIC SYSTEM
Аннотация: The basic structural framework of lamellarin alkaloids, 8,9-dihydro-6H-chromeno[4?,3?:4,5]pyrrolo[2,1-a]isoquinoline derivatives, has been obtained in good yields via Grob synthesis between 3-nitro-2-(trifluoromethyl)-2H-chromenes and 1-methyl-3,4-dihydroisoquinolines in refluxing isobutanol. In the case of 1-benzyl-3,4-dihydroisoquinolines, a dynamic NMR effect was observed in the 1H and 19F NMR spectra of the products as a result of restricted rotation about the single bond linking the benzene ring and the heterocyclic system. When the reaction was carried out with 3-nitro-2-(trichloromethyl)-2H-chromenes in toluene at room temperature, only Michael adducts, as a mixture of two diastereomers, were isolated.??????--------------------------------------------------------------------------------??

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7.
Инвентарный номер: нет.
   
   Y 32


    Yatluk, Yu. G.
    Condensation of Ketones in the Presence of Titanium Alkoxides [Electronic resource] / Yu. G. Yatluk, V. Ya. Sosnovskikh, A. L. Suvorov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2004. - Vol. 40, № 6. - P763-765
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Titanium alkoxides promote successful condensation of aromatic and aliphatic ketones provided that the liberated alcohol is selectively removed from the reaction mixture

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2004, 40 (6), 763.pdf
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8.
Инвентарный номер: нет.
   
   D 53


   
    Diastereoselective reactions of 1,1,1-trichloro(trifluoro)-3-nitrobut-2-enes with 2-morpholinoalk-1-enes [Electronic resource] / V. Yu. Korotaev, A. Yu. Barkov, P. A. Slepukhin, M. I. Kodess, V. Ya. Sosnovskikh // Mendeleev Communications. - 2011. - Vol. 21, № 2. - P112-114. - Bibliogr. : p. 114 (12 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of (E)-1,1,1-trichloro(trifluoro)-3-nitrobut-2-enes with 3,3-dimethyl-2-morpholinobutene in benzene give (4R*,6R*)-6-tert-butyl-3-methyl-6-morpholino-4-trihalomethyl-5,6-dihydro-4H-1,2-oxazine 2-oxides. In a dichloromethane solution, these cyclic nitronates undergo diastereoselective ring opening to produce nitroalkylated anti-CCl3- and syn-CF3-enamines, which are hydrolysed with dilute HCl to afford the respective anti-CCl3- and syn-CF3-g-nitroketones

\\\\Expert2\\nbo\\Mendeleev Communications\\2011, v.21, p.112.pdf
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9.
Инвентарный номер: нет.
   
   H 65


   
    Highly diastereoselective 1,3-dipolar cycloaddition of nonstabilized azomethine ylides to 3-nitro-2-trihalomethyl-2H-chromenes: synthesis of 1-benzopyrano[3,4-c]pyrrolidines [Electronic resource] / V. Yu. Korotaev, A. Yu. Barkov, V. S. Moshkin, E. G. Matochkina, M. I. Kodess, V. Ya. Sosnovskikh // Tetrahedron. - 2013. - Vol.69, №40. - P8602-8608. - Bibliogr. : p. 8608 (13 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
3-NITRO-2H-CHROMENES -- NONSTABILIZED AZOMETHINE YLIDES -- 1,3-DIPOLAR CYCLOADDITION
Аннотация: Reactions of 3-nitro-2-trifluoro(trichloro)methyl-2H-chromenes, including 2-unsubstituted derivatives, with N-alkyl-α-amino acids (sarcosine, proline) and paraformaldehyde proceed diastereoselectively to give 1-benzopyrano[3,4-c]pyrrolidines in good yields as a result of a 1,3-dipolar cycloaddition of the intermediate nonstabilized azomethine ylide at the Δ3-bond of the chromene system

\\\\expert2\\NBO\\Tetrahedron\\2013, v. 69, p. 8602.pdf
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10.
Инвентарный номер: нет.
   
   M 61


   
    Metal and boron derivatives of fluorinated cyclic 1,3-dicarbonyl compounds [Text] / D. V. Sevenard, O. G. Khomutov, N. S. Boltacheva, V. I. Filyakova, V. Vogel, V. Ya. Sosnovskikh, V. O. Iaroshenko, G. -V. Roeschenthaler // Zeitschrift fur Naturforschung - Section B. Journal of Chemical Science. - 2009. - Vol. 64, № 5. - P541-550
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Starting from the corresponding cyclic 1,3-diketones or other precursors (cyclic ketones as well as lactones), several new salts and chelate complexes of fluorinated 1,3-dicarbonyls were obtained. Their preparative significance was demonstrated by straightforward syntheses of fluorinated pyrazoles, benzimidazoles and 1,7-ketoesters. The structure of a boron chelate of 2-(trifluoroacetyl)- cyclohexanone was investigated by X-ray diffraction

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