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Общее количество найденных документов : 20
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 1-10    11-20  
1.
Инвентарный номер: нет.
   
   U 62


   
    Unusual dimerization of 1-ethyl-1,2,4-triazinium salts into 4a,4b,9,10-tetrahydro-1,3,6,8,8a,10a-hexaazaphenanthrenes [Text] / O. N. Chupakhin, B. V. Rudakov, S. G. Alexeev, V. N. Charushin, V. A. Chertkov // Tetrahedron Letters. - 1990. - Vol. 31, N 52. - P7665-7668
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 1-Ethyl-3-alkylthio-5-phenyl-1,2,4-triazinium tetrafluoroborates were found to undergo an unusual dimerization on treatment with triethylamine in methanol or ethanol solution. A mechanism for the formation of 4a,4b,9,10-tetrahydro-1,3,5,8,8a,10a-hexaaza-phenanthrenes is proposed

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2.
Инвентарный номер: нет.
   
   Г 67


    Горбунова, Т. И.
    Реакция 1.1.2.3.3-пентафтор-1.5-гексадиена с метанолом в присутствии основания [] = Reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with methanol in the presence of a base / Т. И. Горбунова, А. Я. Запевалов, В. И. Салоутин // Изв. АН. Сер. Химическая. - 1994. - Vol. 43, № 4. - С. 758-759 . - ISSN 0002-3353
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
1.1.2.3.3-ПЕНТАФТОР-1.5-ГЕКСАДИЕН -- метанолы -- ОСНОВАНИЯ (ХИМИЯ) -- ОРГАНИЧЕСКАЯ ХИМИЯ -- ХИМИЯ ОРГАНИЧЕСКАЯ

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3.
Инвентарный номер: нет.
   
   C 52


    Chizhov, D. L.
    Reaction of trifluoromethylated beta-alkoxyenones with tris(trimethylsilyl) phosphite: A temperature influence on regioselectivity [Text] / D. L. Chizhov, G. -V. Roeschenthaler // Journal of Fluorine Chemistry. - 2006. - Vol. 127, № 2. - P235-239
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The interaction of tris(trimethylsilyl) phosphite (TMSO)3P and E-trifluoromethyl-alkoxyenones CF3C(O)CHCHOEt and CF3C(O)CHC(OMe)Me yielded mixtures of E-1,2- and Z-1,4-adducts, CF3C(OTMS)[P(O)(OTMS)2]CCH(OAlk)R 2 and CF3(OTMS)CCHCR(OAlk)[P(O)(OTMS)2] 3 where R and Alk = H and Me, or both Me. Conversion of these 1,2-adducts to 1,4-isomers was effected by increased temperature or by exposure to more tris(trimethylsilyl) phosphite. Acid hydrolysis of 2b (R and Alk = Me) gave ketophosphonic acid CF3C(OH)[P(O)(OH)2]CH2COMe in 88% yield, whereas hydrolysis of 2a (R = H and Alk = Et) with KOH in methanol gave CF3C(OH)[P(O)(OK)2]CHCHOEt in 37% yield. Acid hydrolysis of 3a (R = H and Alk = Et) and 3b (R and Alk = Me) gave phosphonic acid CF3C(OH)2CHCHP(O)(OH)2 in 82% yield and trifluoromethylated 1,2,5,4-oxaphosphol-3-en

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2006, v.127, p.235.pdf
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4.
Инвентарный номер: нет.
   
   P 93


    Prokhorov, A. M.
    CuCl2 induced reactions of 6-ethynyl- and 6-cyano-5-aryl-2,2-bipyridines with various N- and O-nucleophiles in comparison with the reactions of relative 1,2,4-triazines [Text] / A. M. Prokhorov, P. A. Slepukhin, D. N. Kozhevnikov // Journal of Organometallic Chemistry. - 2008. - Vol. 693, № 10. - P1886-1894
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Meanwhile 5-aryl-6-cyano-2,2-bipyridines are very stable towards various nucleophiles, addition copper(II) chloride to the reactional mixture facilitates nucleophilic addition to the cyano group dramatically. The cyanobipyridines react easily with water, methanol, ethanolamine in the presence of CuCl2 yielding well-crystallized complexes containing carboxylates, carboximidates or carboxamidines as ligands. 5-Cyano-1,2,4-triazines are more active in the reactions due to higher electron-withdrawing properties of this heterocycle. Due to the same reason acetylene moiety of 5-ethynyl-3-pyridyl-1,2,4-triazine adds water quite easily but in the presence of copper chloride as well

\\\\Expert2\\nbo\\Journal of Organometallic Chemistry\\2008, v.693, p.1886.pdf
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5.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and sorption properties of new hybrid chelating sorbents with ?-alanine functional groups [Electronic resource] / Yu. G. Yatluk, D. V. Eremin, L. K. Neudachina, Yu. A. Skorik // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 12. - P2730-2735
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A series of gamma-aminopropylsilylated sorbents was obtained from different oxide supports (silica gels, silica fillers, macroporous glasses, alumina) and by the direct synthesis (hydrolytic polycondensation of tetraalkoxysilanes with gamma-aminopropyltriethoxysilane). The highest degree of immobilization was achieved for silicas, while the most convenient solvent was methanol. Sorbents with beta-alanine functional groups were obtained by the subsequent reaction with acrylic acid. The degree of beta-carboxyethylation was 1.3–1.9, and the highest content of functional groups (vCOOH = 3.23 mmol g–1) was achieved for carboxyethylated xero gel synthesized by the copolycondensation of tetraethoxysilane with -aminopropyltriethoxysilane. The sorbents containing beta-alanine possess a higher selectivity of Cu2+ ion sorption than the initial gamma-aminopropylsilylated sorbents

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (12), 2730.pdf
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6.
Инвентарный номер: нет.
   
   B 74


    Boltacheva, N. S.
    Fluoroalkyl-Containing Lithium 1,3-Diketonates in Reactions with Amines and Ammonium Salts [Electronic resource] / N. S. Boltacheva, T. I. Filyakova, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 10. - P1452-1457
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Reactions of fluoroalkyl-containing lithium 1,3-diketonates with amines or ammonium salts in glacial acetic acid or methanol at 20°C provide an efficient synthetic route to fluoroalkyl-containing ?-amino-vinyl ketones. Depending on the conditions, reactions of lithium diketonates with 1-aminonaphthalene lead to formation of both ?-aminovinyl ketones and cyclocondensation products, benzo[h]quinolines. The latter can be obtained in one step without isolation of ?-aminovinyl ketones

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (10), 1452.pdf
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7.
Инвентарный номер: нет.
   
   P 34


    Pavlov, A. M.
    Synthesis of beta-Fluoroalkyl-beta,beta-dimethoxy Ketones and beta-Fluoroalkyl-Beta-methoxy-beta,beta-enones [Electronic resource] / A. M. Pavlov, D. L. Chizhov, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 10. - P1449-1451
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: alfa-Bromo-beta-fluoroalkyl-alfa,beta-enones react with sodium methoxide in methanol to give the corresponding beta-fluoroalkyl-beta,beta-dimethoxy ketones which eliminate methanol molecule to produce a mixture of E/Z-isomeric beta-fluoroalkyl-?-methoxyvinyl ketones, the Z isomer prevailing

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (10), 1449.pdf
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8.
Инвентарный номер: нет.
   
   G 65


    Gorbunova, T. I.
    Reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with methanol in the presence of a base [Electronic resource] / T. I. Gorbunova, A. Ya. Zapevalov, V. I. Saloutin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1994. - Vol. 43, № 4. - P711-712
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene (1) with MeOH in the presence of MeONa results in products of substitution, rearrangement, hydro-, or dehydrofluorination, depending on the reaction conditions

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1994, 43 (4), 711.pdf
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9.
Инвентарный номер: нет.
   


   
    2,3-Epoxyperfluoro-2-methylpentane in reactions with urea and thiourea [Electronic resource] / T. I. Filyakova, V. I. Saloutin, A. Ya. Zapevalov, P. A. Slepukhin, M. I. Kodess, V. I. Saloutin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2011. - Vol. 47, № 5. - P650-658 : рис., табл. - Bibliogr. : p. 658 (24 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 2,3-Epoxyperfluoro-2-methylpentane reacts with thiourea in protic (methanol, 2-propanol) and aprotic (dioxane) solvents, and also with urea in acetonitrile affording unexpected products: 1-(2,2,3,3,3-pentafluoropropionyl)-2-(2,2,2-trifluoro-1-trifluoro-methylethyl)isothiourea, and 1-(2,2,3,3,3-pentafluoropropionyl)-3-(2,2,2-trifluoro-1-trifluoro-methylethyl)urea respectively that result from the rearrangement of the intermediately formed ketone in the process of the intramolecular “haloform” cleavage. At the same time in dioxane the 2,3-epoxyperfluoro-2-methylpentane reacts with urea with the formation of a heterocyclic compound, 2-amino-4-pentafluoroethyl-5,5-bis(trifluoromethyl)-4,5-dihydrooxazol-4-ol. From 1-(2,2,3,3,3-pentafluoropropionyl)-2-(2,2,2-trifluoro-1-trifluoromethylethyl)isothiourea and Cu(OAc)2 a stable fluorine-containing chelate complex was obtained

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2011, 47 (5), 650-658.pdf
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10.
Инвентарный номер: нет.
   
   N 91


   
    Nucleophilic dimerization of indoline under oxidative conditions [Electronic resource] / I. S. Kovalev, D. S. Kopchuk, G. V. Zyryanov, V. L. Rusinov, O. N. Chupakhin // Mendeleev Communications. - 2014. - Vol.24, №1. - С. 40-41. - Bibliogr. : p. 41 (10 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
INDOLINE -- HYDROGEN PEROXIDE -- METHANOL
Аннотация: Oxidation of indoline with 30% hydrogen peroxide in methanol in the presence of sodium tungstate affords the dimeric 3-oxo-1’H,3H- 2,3’-biindole-1-oxide.

\\\\expert2\\nbo\\Mendeleev Communications\\2014, v.24 (1), p. 40.pdf
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