Ф 57 Филякова, В. И. Бромирование полифторированных альфа,бета-енонов [] = Bromination of polyfluorinated alpha,beta-enones : бромирование полифторированных альфа,бета-енонов / В. И. Филякова, Р. Г. Латыпов, К. И. Пашкевич> // Изв. АН. Сер. Химическая. - 1993. - N 12. - С. 2134-2135 . - ISSN 0002-3353 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
R 30 Reaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene [Electronic resource] / T. I. Gorbunova, A. Ya. Zapevalov, V. I. Saloutin> // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1995. - Vol.44, N8. - P1470-1473 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Interaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with Br-2: in a MeCOOH medium results in the product of selective bromination of the hydrocarbon double bond, 5,6-dibromo-1,1,2,3,3-pentafluoro-1-hexane. \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1995, 44 (8), 1470.pdf |
P 30 Pashkevich, K. I. Bromination of regioisomeric fluorine-containing beta-aminovinyl ketones [] / K. I. Pashkevich, V. I. Filyakova, N. S. Karpenko> // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1992. - Vol.41, N3. - С. 586-588 ; Рубрики: ХИМИЧЕСКИЕ НАУКИ \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1992, 41 (3), 586.pdf |
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.) 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 |
F 52 Filyakova, V. I. Bromination of polyfluorinated alfa,beta-enones [Electronic resource] / V. I. Filyakova, R. R. Latypov, K. I. Pashkevich> // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1993. - Vol. 42, № 12. - P2047-2048 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Polyfluoroalkyl-alfa,beta-enones readily add Br2 to give alfa ,beta-dibromoketones. The latter are readily and regioselectively dehydrobrominated to alfa-bromo-alfa,beta-enones on treatment with K2CO3 or NEt3 \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1993, 42 (12), 2047.pdf |
G 65 Gorbunova, T. I. Synthesis of oxyranes based on 1,1,2,3,3-pentafluoro-1,5-hexadiene [Electronic resource] / T. I. Gorbunova, A. Ya. Zapevalov, V. I. Saloutin> // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1995. - Vol. 44, № 8. - P1470-1473 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Interaction of 1,1,2,3,3-pentafluoro-1,5-hexadiene with Br2 in a MeCOOH medium results in the product of selective bromination of the hydrocarbon double bond,i.e., 5,6-dibromo-1,1,2,3,3-pentafluoro-1-hexene. Epoxidation of the latter with H2O2 in an alkaline medium followed by debromination afforded 5,6-epoxy-4,4,5,6,6-pentafluoro-1-hexene for the first time \\\\Expert2\\nbo\\Russian Chemical Bulletin\\1995, 44 (8), 1470.pdf |
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 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 |
C 21 Carboxyethenylation of polychlorobiphenyls / A. Mechaev, A. V. Pestov, Yu. G. Yatluk, M. G. Pervova, A. A. Panyukova> // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2013. - Vol.49, №5. - С. 691-695. - Библиогр.: с. 695 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): BUTYL ACRYLATE -- PALLADIUM CATALYSTS -- POLYCHLOROBIPHENYLS Аннотация: For the first time 2-carboxyethenylation was performed with butyl acrylate in the presence of palladium catalysts of bromine derivatives of polychlorobiphenyls obtained by bromination of polychlorobiphenyls. The haloderivatives of the butyl phenylcinnamate are readily hydrolyzed and hydrodehalogenized affording a mixture of phenylhydrocinnamic acids \\\\expert2\\NBO\\Russian Journal of Organic Chemistry\\2013, 49, (5), 691-695.pdf |
S 98 Synthesis and Photophysical Studies of 2-(Thiophen-2-yl)-4-(morpholin-4-yl) quinazoline Derivatives [Electronic resource] / E. V. Nosova, T. N. Moshkina, G. N. Lipunova, D. S. Kopchuk, P. A. Slepukhin, I. V. Baklanova , V. N. Charushin> // European Journal of Organic Chemistry. - 2016. - № 16. - С. 2876-2881 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PHOTOPHYSICS -- CHARGE TRANSFE -- FLUORESCENCE Аннотация: The synthesis of a series of push-pull aryl and arylethynyl 2-(thiophen-2-yl) quinazoline derivatives is presented. The photophysical properties of the newly generated compounds are also described. Functionalization of the (2-thienyl) quinazoline fluorophore at the 5'-position with aryl and arylethynyl moieties was performed using bromination and subsequent palladium-catalyzed cross-coupling reactions. Optical studies revealed that 4-(diethylamino) phenyl and 4-(diphen-ylamino) phenyl derivatives emit green light upon irradiation, whereas their 4-(9H-carbazol-9-yl) phenyl, methoxyphenyl, thienyl and arylethynyl counterparts are characterized by blue light emission capabilities. The effect of protonation has also been studied, and the ability of some of these molecules to function as colorimetric and luminescent pH sensors has been demonstrated with significant color changes and luminescence switching upon the introduction of acid. \\\\expert2\\NBO\\European Journal of Organic Chemistry\\2016, №16. p.2876-2881.pdf |
M 65 Microwave-assisted synthesis of 4-(2,2'-bithiophen-5-yl)-5-phenylpyrimidine derivatives as sensors for detection of nitroaromatic explosives = Микроволновый синтез производных 4-(2,2'-битиофенил-5-ил)-5-фенилпиримидина и их применение в качестве сенсоров нитроароматических взрывчатых веществ / E. V. Verbitskiy, E. M. Cheprakova, A. A. Baranova, K. O. Khokhlov, K. I. Ludovik, G. L. Rusinov, O. N. Chupakhin, V. N. Charushin> // Chemistry of Heterocyclic Compounds. - 2016. - Vol. 52, № 11. - С. 904-909. - Bibliogr. : p. 909 (27 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PYRIMIDINE TRIPHENYLAMINE -- NITROAROMATIC EXPLOSIVES -- FLUORESCENCE QUENCHING Аннотация: A reaction sequence involving microwave-assisted Suzuki cross-coupling steps and bromination with N-bromosuccinimide was used to synthesize 4-{4-[4',5'-bis(4-diphenylaminophenyl)-3'-hexyl-2,2'-bithiophen-5-yl]pyrimidin-5-yl}benzonitrile. The optical properties of the obtained compound were studied to evaluate it for possible applications as a sensor of nitroaromatic compounds in acetonitrile solutions and gas phase \\\\expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2016, v.52, N 11, p. 904-909.pdf |