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 Найдено в других БД:Публикации Чарушина В.Н. (2)
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Общее количество найденных документов : 14
Показаны документы с 1 по 10
 1-10    11-14 
1.
Инвентарный номер: нет.
   
   C 52


    Chizhov, D. L.
    Reactions of fluoroalkyl-containing bis-beta-diketones with hydrazine and hydroxylamine [Electronic resource] / D. L. Chizhov, V. G. Ratner, K. I. Pashkevich // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1999. - Vol. 48, N 4. - P758-760
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Polyfluoroalkyl-containing bis(5-hydroxy-Delta(2)-isoxazolines), and bisisoxazoles were synthezed for the first time by reactions of polyfluoroalkyl-containing bis-beta-diketones with hydrazine, phenylhydrazine, and hydroxylamine, respectively

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1999, 48 (4), 758-760.pdf
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2.
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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3.
Инвентарный номер: нет.
   
   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.)
ББК 54
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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4.
Инвентарный номер: нет.
   
   T 44


   
    The amidine rearrangement in 5-amino-6-aryl-1,2,4-triazine-4-oxides initiated by hydroxylamine [Text] / O. N. Chupakhin, V. N. Kozhevnikov, A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov // Tetrahedron Letters. - 2000. - Vol. 41, № 38. - P7379-7382
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis of fluorinated 2(3)-arylhydrazones of 1,2,3-tri(1,2,3,4-tetra)carbonyl compounds and their heterocyclization reactions [] / Ya. V. Burgart, A. S. Fokin, O. G. Kuzueva, O. N. Chupakhin, V. I. Saloutin // Journal of Fluorine Chemistry. - 1998. - Vol. 92, № 2. - С. 101-108
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: New fluorinated 2-arylhydrazones of 1,2,3-triketones, 2-arylhydrazone-1,2,3-diketo esters and 3-arylhydrazone-1,2,3,4-triketo esters have been prepared by the coupling of fluorine-containing 1,3-keto esters, 1,3-diketones, acyl(aroyl)pyruvic esters and their chelates with aryldiazonium chlorides. The arylhydrazones react with hydrazine hydrate, phenylhydrazine, thiosemicarbazide and hydroxylamine to form the corresponding pyrazole and isoxazole derivatives. Interaction of 3-arylhydrazone-1,2,3,4-diketo esters with o-phenylenediamine results in quinoxaline products. Intramolecular cyclization of the arylhydrazones with pentafluorophenyl substituents leads to cinnolone derivatives

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6.
Инвентарный номер: нет.
   
   K 96


    Kuzueva, O. G.
    Synthesis of 2-arylhydrazones of aliphatic fluorine-containing 1,2,3-tricarbonyl compounds and their reactions with dinucleophiles [Electronic resource] / O. G. Kuzueva, Ya. V. Burgart, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1998. - Vol. 47, № 4. - P673-678
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: New fluorinated 2-arylhydrazones of 1,2,3-tricarbonyl compounds were obtained by coupling fluorine-containing 3-oxo esters, 1,3-diketones, and their copper chelates with aryldiazonium chlorides. Reactions of these arylhydrazones with hydrazine hydrate, phenylhydrazine, thiosemicarbazide, and hydroxylamine gave the corresponding pyrazole and isoxazole derivatives

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1998, 47 (4), 673.pdf
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7.
Инвентарный номер: нет.
   
   T 82


   
    Transformations of C-adducts of 1,4-diazinium salts with dicarbonyl compounds into polycyclic systems [Electronic resource] / E. V. Verbitskiy, P. A. Slepukhin, G. L. Rusinov, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2008. - Vol. 57, № 3. - P652-656
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: C-Adducts of 5-(het)aryl-2,3-dicyano-1-pyrazinium salts containing a residue of a 1,3-dicarbonyl compound at position 6 can be involved in the cyclization with hydrazine hydrate giving rise to pyrazino[2,3-c]pyridazines along with the expected pyrazole derivatives. The reactions of the same ?H-adducts with hydroxylamine unexpectedly afforded triazacyclopenta[a]indene derivatives. The crystallographic data on the three-dimensional structures of new polycyclic compounds were obtained

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2008, 57 (3), 652.pdf
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8.
Инвентарный номер: нет.
   
   K 96


    Kuznetsova, O. A.
    Synthesis of fluorine-containing functionalized isoxazolines [Electronic resource] / O. A. Kuznetsova, V. I. Filyakova, K. I. Pashkevich // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1996. - Vol. 45, № 5. - P1245-1246
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reaction of regioisomeric fluoroalkyl-containing (3-aminovinylketones with hydroxylamine generatedin situ from hydroxylamine sulfate, afforded 5-hydroxy- or 5-amino-5fluoroalkyl-2-isoxazolines

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1996, 45 (5), 1245.pdf
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9.
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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10.
Инвентарный номер: нет.
   
   R 30


   
    Reaction of 2-(polyfluoroacyl)cycloalkanones with hydroxylamine [Text] / D. V. Sevenard, O. G. Khomutov, K. I. Pashkevich, E. Lork, G. -V. Roeschenthaler // Helvetica Chimica Acta. - 2002. - Т. 85, № 7. - P1960-1972. - Библиогр.: с.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The 2-acylcycloalkanones 1a-g and 3a-c, possessing a polyfluoroalkyl group, react with hydroxylamine regio- and stereoselectively to yield 4,5-dihydroisoxazol-5-ols 2a-g and 4a-c, respectively, i.e., products of N-addition to the oxo group at the cycloalkane ring (Schemes 1 and 2). The products 2 and 4 can be dehydrated under drastic conditions only (Schemes 3 and 4). The structure of one of the 4,5-dihydroisoxazol-5-ols was confirmed by X-ray crystal-structure analysis

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 1-10    11-14 
 

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