Центральная Научная Библиотека УрО РАН

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   U 52


    Unexpexted isomerization in the series of fluorine-containing 2,3-dihydro-1H-1,4-diazepines with a 2-aminoethyl group at one of the nitrogen atoms [Electronic resource] / V. Ya. Sosnovskikh, I. I. Vorontsov, V. A. Kutsenko, Yu. G. Yatluk // Mendeleev Communications. - 2000. - Vol. 10, N 2. - P56-58 . - ISSN 0959-9436

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Рубрики: ХИМИЧЕСКИЕ НАУКИ

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   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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   N 52


    New derivatives of dehydroacetic acid: synthesis of 2-polyfluoroalkyl-7-methylpyrano[4,3-b]pyran-4,5-diones [Electronic resource] / V. Ya. Sosnovskikh, B. I. Usachev, A. G. Blinov, M. I. Kodess // Mendeleev Communications. - 2001. - Vol. 11, N 1. - P36-38: il. - Bibliogr. : p. 37-38 (21 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПРОИЗВОДНЫЕ (ХИМИЯ) -- ПРОИЗВОДНЫЕ ДЕГИДРОУКСУСНОЙ КИСЛОТЫ -- КИСЛОТА ДЕГИДРОУКСУСНАЯ -- ДЕГИДРОУКСУСНАЯ КИСЛОТА -- СИНТЕЗ ОРГАНИЧЕСКИЙ -- ОРГАНИЧЕСКИЙ СИНТЕЗ -- 2-ПОЛИФТОРАЛКИЛ-7-МЕТИЛПИРАНО[4.3-b]ПИРАН-4.5-ДИОНЫ -- КОНДЕНСАЦИЯ -- ЦИКЛИЗАЦИЯ -- ОРГАНИЧЕСКАЯ ХИМИЯ -- ХИМИЯ ОРГАНИЧЕСКАЯ

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   T 44


    The first synthesis of 4-unsubstituted 3-(trifluoroacetyl)coumarins by the Knoevenagel condensation of salicylaldehydes with ethyl trifluoroacetoacetate followed by chromene-coumarin recyclization [Text] / D. L. Chizhov, V. Ya. Sosnovskikh, M. V. Pryadeina, Ya. V. Burgart, V. I. Saloutin, V. N. Charushin // Synlett. - 2008. - № 2. - P281-285

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Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\expert2\\nbo\\Synlett\\2008. N 2. P. 281-285.pdf
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   R 30


    Reaction of Polyhaloalkyl-Substituted Chromones, Pyrones, and Furanones with Salicylaldehydes as a Direct Route to Fused 2H-Chromenes [Electronic resource] / V. Ya. Sosnovskikh, V. Yu. Korotaev, D. L. Chizhov, I. B. Kutyashev, D. S. Yachevskii, O. N. Kazheva, O. A. Dyachenko, V. N. Charushin // Journal of Organic Chemistry. - 2006. - Vol. 71, № 12. - P4538-4543

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Polyhaloalkyl-substituted chromones, Y-pyrones, and B-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. ??

\\\\Expert2\\nbo\\Journal of Organic Chemistry\\2006, v.71, N 12, p.4538.pdf
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   K 66

    Kodess, M. I.
    Reactions of 3-(polyfluoroacyl)chromones with hydroxylamine : synthesis of novel R - containing isoxazole and chromone derivatives [Electronic resource] / M. I. Kodess, V. Ya. Sosnovskikh, V. S. Moshkin // Tetrahedron. - 2008. - Vol. 64, № 34. - P7877-7889 : рис. - Библиогр. : с. 7888-7889 (32 назв.)

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reaction of 3-(polyfluoroacyl)chromones with hydroxylamine free base proceeds via nucleophilic 1,4-addition followed by opening of the pyrone ring and subsequent cyclization to 4-(polyfluoroalkyl)-4H-chromeno[3,4-d]isoxazol-4-ols in good yields. On treatment with trifluoroacetic acid, the isoxazole ring of this annulated heterocyclic system opens to give 3-cyano-2-(polyfluoroalkyl)chromones, which were successfully hydrolyzed with concentrated H2SO4 to afford 3-carbamoyl-2-(polyfluoroalkyl)chromones. On the other hand, oximation of 3-(polyfluoroacyl)chromones with hydroxylamine hydrochloride occurs either at the carbonyl carbon atom connected to the RF group or at the C-2 atom to give 3-RFC(NOH)-chromones and 5-RF-4-salicyloylisoxazole oximes, respectively. The former were easily converted to 3-RF-4-salicyloylisoxazoles by simple heating in dimethyl sulfoxide.??

\\\\Expert2\\nbo\\Tetrahedron\\2008, v. 64, N34, p. 7877.pdf
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   S 83


    Stereoselective hetero-Diels-Alder reaction of 3-(polyfluoroacyl)chromones with enol ethers. Novel synthesis of 2-R -containing nicotinic acid derivatives [Text] / V. Ya. Sosnovskikh, I. A. Khalymbadzha, R. A. Irgashev, P. A. Slepukhin // Tetrahedron. - 2008. - Vol. 64, № 44. - P10172-10180 : рис., табл. - Библиогр. : с. 10180 (15 назв.)

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Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Tetrahedron\\2008, v. 64, N44, p. 10172.pdf
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   S 83


    Stereoselective hetero-Diels-Alder reaction of 3-(trifluoroacetil)chromones with ceclic enol ethers: synthesis of 3-aroyl-2-(trifluoromethyl)pyridines with omega-hydroxyalkyl groups [Text] / V. Ya. Sosnovskikh, R. A. Irgashev, I. A. Khalymbadzha, P. A. Slepukhin // Tetrahedron Letters. - 2007. - Vol. 48, № 36. - P6297-6300

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Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Tetrahedron Letters\\2007, v. 48, p.6297.pdf
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   N 89


    Novel chemical modifications at the 4-position of chromones. Synthesis and reactivity of 4H-chromene-4-spiro-5-isoxazolines and related compounds [Text] / V. Ya. Sosnovskikh, B. I. Usachev, A. Yu. Sizov, M. I. Kodess // Tetrahedron Letters. - 2004. - Vol. 45, № 39. - P7351-7354 : ил. - Библиогр.: с. 7353-7354 (22 ref.)

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHROMONES -- DILITHIOOXIMES -- 4H-CHROMENE-4-SPIRO-5'-ISOXAZOLINES; -- ALFA,BETA-UNSATURATED OXIMES -- BECKMANN REARRANGEMENT -- NITROSATION -- BROMINATION
Аннотация: Reactions of chromones with dilithiooximes proceed via nucleophilic 1,2-addition to give, on acidification, 4H-chromene-4-spiro-5-isoxazoline derivatives in high yields. On treatment with concentrated H2SO4 the isoxazoline ring of this novel spiroannulated heterocyclic system opens to give alfa,beta-unsaturated oximes, which undergo nitrosation, bromination, and the Beckmann rearrangement to the corresponding spiroisoxazolines and alfa,beta-unsaturated amides, respectively. The latter can be obtained directly by the Beckmann rearrangement of 4H-chromene-4-spiro-5`-isoxazolines

\\\\Expert2\\nbo\\Tetrahedron Letters\\2004, v. 45, p.7351.pdf
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10.

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   S 98


    Synthesis of 2,3,4-Trisubstituted Chromans Via Nucleophilic Addition of N-, C-, and S-Nucleophiles to 3-Nitro-2-Trihalomethyl-2H-Chromenes. Stereochemical and Conformational Preferences [Text] / V. Yu. Korotaev, V. Ya. Sosnovskikh, I. B. Kutyashev, M. I. Kodess // Letters in Organic chemistry. - 2005. - Vol. 2, № 7. - P616-620

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 2,3,4-Trisubstituted chromans synthesis via the nucleophilic addition of N-, C-, and S-nucleophiles to 3-nitro-2-trifluoro(trichloro)methyl-2H-chromenes have been developed. Stereochemical and conformational preferences of these compounds were studied

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11.

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   S 83


    Stereoselective synthesis of N-unsubstituted pyrazolidines from 3-nitro-2-trichloromethyl-2H-chromenes and hydrazine hydrate [Electronic resource] / V. Yu. Korotaev, I. B. Kutyashev, V. Ya. Sosnovskikh, M. I. Kodess // Mendeleev Communications. - 2007. - Vol. 17, № 1. - P52-53

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Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Mendeleev Communications\\2007, v.17, p.52.pdf
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12.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    One-pot three-component reaction of 3-(polyfluoroacyl)chromones with active methylene compounds and ammonium acetate: regioselective synthesis of novel RF-containing nicotinic acid derivatives [Text] / V. Ya. Sosnovskikh, R. A. Irgashev, M. I. Kodess // Tetrahedron. - 2008. - Vol. 64, № 13. - P2997-3004

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
THREE-COMPONENT REACTIONS -- AMMONIUM ACETATE
Аннотация: Reactions of 3-(polyfluoroacyl)chromones with acetoacetamide and ethyl acetoacetate in the presence of ammonium acetate proceed at the C-2 atom of the chromone system with pyrone ring-opening and subsequent cyclization to 5-salicyloyl-2-methyl-6-(trifluoromethyl)nicotinamides, ethyl 5-salicyloyl-2-methyl-6-(trifluoromethyl)nicotinates, and ethyl 5-hydroxy-2-methyl-5-(polyfluoroalkyl)-5H-chromeno[4,3-b]pyridine-3-carboxylates. Similar reaction with ?-aminocrotononitrile gave 5-hydroxy-2-methyl-5-(polyfluoroalkyl)-5H-chromeno[4,3-b]pyridine-3-carbonitriles????

\\\\Expert2\\nbo\\Tetrahedron\\2008, v. 64, N13, p. 2997.pdf
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13.

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   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

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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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14.

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

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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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15.

Инвентарный номер: нет.

   R 35


    Regioselective solvent-sensitive reactions of 6-(trifluoromethyl)comanic acid and its derivatives with phenylhydrazine [Text] / B. I. Usachev, D. L. Obydennov, M. I. Kodess, V. Ya. Sosnovskikh // Tetrahedron Letters. - 2009. - Vol. 50, № 31. - P4446-4448

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 6-(Trifluoromethyl)comanic acid reacts regioselectively with phenylhydrazine in water to give 5-[3,3,3-trifluoro-2-(phenylhydrazono)propyl]-1-phenyl-1H-pyrazole-3-carboxylic acid. Similar reaction in dioxane leads to 3-[3,3,3-trifluoro-2-(phenylhydrazono)propyl]-1-phenyl-1H-pyrazole-5-carboxylic acid. A strong solvent influence on the reaction route was also found for 6-(trifluoromethyl)comanic acid derivatives

\\\\Expert2\\nbo\\Tetrahedron Letters\\2009, v. 50, p.4446.pdf
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16.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    Structural revision in the reactions of 3-cyanochromones with primary aromatic amines. Improved synthesis of 2-amino-3-(aryliminomethyl)chromones [Text] / V. Ya. Sosnovskikh, V. S. Moshkin, M. I. Kodess // Tetrahedron Letters. - 2009. - Vol. 50, № 47. - P6515-6518

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3-Cyanochromones react with primary aromatic amines to give 2-amino-3-(aryliminomethyl)chromones as the sole products or as their mixtures with Z- and E-3-anilino-2-salicyloylacrylonitriles, depending on the reaction conditions. With aliphatic amines, 2-amino-3-(alkyliminomethyl)chromones are obtained in good yields. The reaction of 3-cyanochromone with o-phenylenediamine is reinvestigated and proof for the product structure and a possible reaction pathway are presented

\\\\Expert2\\nbo\\Tetrahedron Letters\\2009, v. 50, p.6515.pdf
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17.

Инвентарный номер: нет.

   R 30


    Reaction of Polyhaloalkyl-Substituted Chromones, Pyrones, and Furanones with Salicylaldehydes as a Direct Route to Fused 2H-Chromenes [Text] : доклад, тезисы доклада / V. Ya. Sosnovskikh, V. Yu. Korotaev, D. L. Chizhov, I. B. Kutyashev, D. S. Yachevskii, V. N. Charushin // 18th ISFC international Symposium on Fluorine Chemistry. Bremen, 30th Jul.-4 Aug. 2006 г. : Final Program. Abstracts. - Bremen, 2006. - P307

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
GAMMA-RYRONES -- BETA-FURANONES

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18.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    Novel synthesis of 1,4,8-triazabicyclo[5.3.0]dec-4-ene derivatives [Electronic resource] / V. Ya. Sosnovskikh, Yu. G. Yatluk, V. A. Kutsenko // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1999. - Vol. 48, № 9. - P1800-1801

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1999, 48 (9), 1800.pdf
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19.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    Simple synthesis of 1,4,8-triazabicyclo[5.3.0]dec-4-ene derivatives from beta-amino-beta-polyfluoroalkylvinyl ketones and diethylenetriamine [Electronic resource] / V. Ya. Sosnovskikh, V. A. Kutsenko, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1999. - Vol. 48, № 7. - P1395-1396

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1999, 48 (7), 1395.pdf
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20.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    Reactions of beta-amino-beta-polyfluoroalkylvinyl ketones with diethylenetriamine. Simple synthesis of 1,4,8-triazabicyclo[5.3.0]dec-4-ene derivatives [Electronic resource] / V. Ya. Sosnovskikh, V. A. Kutsenko, Yu. G. Yatluk // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2000. - Vol. 49, № 8. - P1426-1429

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Beta-Amino-beta-polyfluoroalkylvinyl aryl(hetaryl) ketones react with diethylenetriamine to form derivatives of a new 1,4,8-triazabicyclo[5.3.0]dec-4-ene system

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2000, 49 (8), 1426.pdf
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21.

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

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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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22.

Инвентарный номер: нет.

   R 30


    Reactions of 3-nitro-2-trihalomethyl-2H-chromenes with S-and N-nucleophiles. Synthesis and stereochemistry of 2,3,4-trisubstituted chromanes [Electronic resource] / V. Yu. Korotaev, V. Ya. Sosnovskikh, I. B. Kutyashev, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 2. - P317-330

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reactions of 3-nitro-2-trifluoromethyl-and 3-nitro-2-trichloromethyl-2H-chromenes with thiols and aromatic amines proceed via the nucleophilic addition type to the activated double bond to form 2,3,4-trisubstituted chromanes in high yields. The stereoisomeric compositions and structures of the diastereomers were determined by 1H, 19F NMR and 2D NOESY spectroscopies and X-ray diffraction analysis

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2006, 55 (2), 317.pdf
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23.

Инвентарный номер: нет.

   R 30


    Reactions of 3-nitro-2-trihalomethyl-2H-chromenes with C-nucleophiles. Synthesis of 3-nitro-4-(pyrazol-4-yl)-2-trihalomethylchromanes [Electronic resource] / V. Yu. Korotaev, V. Ya. Sosnovskikh, I. B. Kutyashev, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 11. - P2020-2031

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The nucleophilic addition of acetylacetone and ethyl acetoacetate at the double bond of 3-nitro-2-trihalomethyl-2H-chromenes in the presence of NaH affords 2,3,4-trisubstituted chromanes containing the ?-dicarbonyl fragment at position 4. The trans-trans configuration and the enol structure of the reaction products were confirmed by 1H NMR spectroscopy and X-ray diffraction. Treatment of these compounds with hydrazine gives the corresponding 3-nitro-4-(pyrazol-4-yl)-2-trihalomethylchromanes. The reactions of 3-nitro-2-trihalomethyl-2H-chromenes with nitromethane and nitroethane in the presence of K2CO3 produce 1,3-dinitro derivatives of the chromane series

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2006, 55 (11), 2020.pdf
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24.

Инвентарный номер: нет.

   S 73

    Sosnovskikh, V. Ya.
    Reaction of 3,3-dialkyl-6-trifluoromethyl-2,3-dihydro-4-pyrones with hydrazine hydrate [Electronic resource] / V. Ya. Sosnovskikh, M. Yu. Mel'nikov, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1998. - Vol. 47, № 7. - P1365-1368

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3,3-Dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrones react with hydrazine hydrate to give 2-hydrazino-2-trifluoromethyl-4-tetrahydropyrone hydrazones. When heated, the latter are transformed into 3(5)-(2-hydroxyethyl)-5(3)-trifluoromethylpyrazoles, while their treatment with HCl in ether leads to 3,3-dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrone azines

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1998, 47 (7), 1365.pdf
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25.

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

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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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26.

Инвентарный номер: нет.

   R 30


    Reaction of 3-(polyfluoroacyl)chromones with hydrazines: new regioselective synthesis of RF-containing pyrazoles [Electronic resource] / V. Ya. Sosnovskikh, R. A. Irgashev, V. S. Moshkin, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2008. - Vol. 57, № 10. - P2146-2155

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of 3-(polyfluoroacyl)chromones with hydrazine, methyl-and phenylhydrazines proceed by the mechanism of nucleophilic 1,4-addition with subsequent pyrone ring opening and heterocyclization at the polyfluoroacyl group to 4-(2-hydroxyaroyl)-3-polyfluoro-alkylpyrazoles or at the aroyl group to 4-polyfluoroalkyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-ols. Regiochemistry of the products was established based on the data of 2D-experiments HSQC, HMBC, and NOESY and X-ray diffraction study

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2008, 57 (10), 2146.pdf
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27.

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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28.

Инвентарный номер: нет.

   S 78


    Spiro[4H-chromene-4,5-isoxazolines] and related compounds: Synthesis and reactivities [Electronic resource] / V. Ya. Sosnovskikh, A. Yu. Sizov, B. I. Usachev, M. I. Kodess, V. A. Anufriev // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 3. - P535-542

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of chromones with methyl ketoximes in the presence of lithium diisopropylamide follow the nucleophilic 1,2-addition mechanism to give spiro[4H-chromene-4,5?-isoxazolines] in good yields. The isoxazoline ring in spiro[4H-chromene-4,5?-isoxazolines] undergoes opening under the action of conc. H2SO4, yielding ?,?-unsaturated oximes. Their nitrosation and bromination lead to the corresponding spiroisoxazolines, while the Beckmann rearrangement, to ?,?-unsaturated amides. The latter are also formed directly from spiro[4H-chromene-4,5?-isoxazolines] under the action of PCl5. N-Substituted acetophenone hydrazones in the presence of lithium diisopropylamide react at the C(4) atom of 2-trifluoromethylchromone, while acetophenone anil under the same conditions, at the C(2) atom

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2006, 55 (3), 535.pdf
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29.

Инвентарный номер: нет.

   S 83


    Stereoselective hetero-Diels–Alder reaction of 3-nitro-2-trihalomethyl-2H-chromenes with 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions [Text] / V. Yu. Korotaev, V. Ya. Sosnovskikh, M. A. Barabanov, E. S. Yasnova, M. A. Ezhikova, M. I. Kodess, P. A. Slepukhin // Tetrahedron. - 2010. - Vol. 66, № 6. - P1404-1409

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3-Nitro-2-trifluoro(trichloro)methyl-2H-chromenes undergo heterodiene cycloaddition to 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions producing novel cyclic nitronates with high stereoselectivity and in good yields. 3,6-Dinitro-2-trifluoromethyl-2H-chromene reacts with two molecules of ethyl vinyl ether to give the tandem [4+2]/[3+2] cycloaddition adduct in 48% yield. The stereochemistry of the products was established based on 2D COSY, NOESY, HSQC, and HMBC experiments and an X-ray diffraction study

\\\\Expert2\\nbo\\Tetrahedron\\2010, v.66, N 6, p.1404.pdf
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30.

Инвентарный номер: нет.

   S 83


    Stereoselective tandem [4 + 2]/[3 + 2] cycloaddition reactions of 3,3,3-trichloro(trifluoro)-1-nitropropenes and 2,3-dihydrofuran [Electronic resource] / V. Yu. Korotaev, V. Ya. Sosnovskikh, M. A. Barabanov, A. Yu. Barkov, M. I. Kodess // Mendeleev Communications. - 2010. - Vol. 20, № 1. - P17-19

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The first example of the domino hetero-Diels–Alder/1,3-dipolar cycloaddition, in which 3,3,3-trichloro(trifluoro)-1-nitropropenes act as both the heterodiene and the dipolarophile in the reaction with 2,3-dihydrofuran, is described. The trichloromethylated nitroolefin gave tricyclic nitroso acetal as a single regio- and stereoisomer, while the trifluoromethylated derivative afforded a 3:1 mixture of two regioisomeric cycloadducts

\\\\Expert2\\nbo\\Mendeleev Communications\\2010, v.20, p.17.pdf
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