S 98 Synthesis and electrochemical properties of fullerene-containing C60-acceptor dyads with fluoronitrobenzene and fluoroquinoxaline moieties as substituents [Electronic resource] / I. P. Romanova, G. G. Yusupova, O. A. Larionova, D. G. Yakhvarov, N. N. Mochul`skaya, L. P. Sidorova, V. V. Zverev, V. N. Charushin, O. G. Sinyashin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 3. - P660-665 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reactions of fullerene C60 with 4-azido-3-fluoro-1-nitrobenzene and 7-azido-6-fluoroquinoxaline afforded earlier unknown cycloadducts (C60-acceptor dyads), in which the electron affinities of the fullerene spheres are comparable with the affinity of nonmodified C60 \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (3), 660.pdf |
C 98 Cyclization of N-alkylazinium cations with bisnucleophiles. 3. endo adducts in the reaction of quinoxalium salts with β-diketones and their x-ray diffraction analysis [Electronic resource] / O. N. Chupakhin, V. N. Charushin, N. A. Klyuev, A. I. Rezvukhin, V. A. Semion // Chemistry of Heterocyclic Compounds. - 1981. - Vol. 17, № 10. - P1046-1052. - Bibliogr. : p. 1052 (22 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): N-ALKYLQUINOXALINLUM SALTS -- β-DICARBONYL COMPOUNDS -- CYCLOADDUCTS Аннотация: The cyclization of N-alkylquinoxalinium salts with the anions of β-dicarbonyl compounds proceeds regioselectively and stereoselectively and leads to endo-3a, 4,9,9a-tetrahydrofuro[2,3-b]quinoxalines. The structure of the cycloadducts was established on the basis of the 1H and 13C NMR spectra and the results of x-ray diffraction analysis \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1981, v.17, N 10, p.1046.pdf |
C 98 Cyclization of N-alkylazinium cations with bifunctional nucleophiles. 10. Isomeric thiazolo[4,5-b]quinoxalines in reactions of N-methylquinoxalinium ions with dithiocarbamates [Electronic resource] / V. N. Charushin, V. G. Baklykov, O. N. Chupakhin, G. M. Petrova, E. O. Sidorov // Chemistry of Heterocyclic Compounds. - 1984. - Vol. 20, № 5. - P549-554. - Bibliogr. : p. 554 (5 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): DIETHYLAMINE -- N-METHYLQUINOXALINIUM IODIDE -- N-ALKYLAZINIUM CATIONS Аннотация: The cyclization of N-methylquinoxalinium iodide with ammonium salts of N-alkyl-dithiocarbamic acids in DMSO leads to 4-methyl-2,3,3a,4,9,9a-hexahydrothiazolo-[4,5-b]quinoxalines, whereas regioisomeric cycloadducts with a reversed orientation of the thiazole ring are formed in ethanol in the presence of diethylamine. \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1984, v.20, N 5, p. 549.pdf |
C 47 Charushin, V. N. Reactions of Azines with Bifunctional Nucleophiles: Cyclizations and Ring Transformations [Electronic resource] / V. N. Charushin, O. N. Chupakhin, H. C. Van der Plas // Advances in Heterocyclic Chemistry. - 1988. - Vol. 43 (C). - С. 301-353. - Bibliogr. : p. 347-353 (200 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): AZINES -- BIFUNCTIONAL REAGENTS -- CYCLOADDUCTS Аннотация: Reactions of azines with bifunctional nucleophiles can give rise to several cycloadducts, the structure depending on the nature of reagents, the structure of the azine substrate, and the reaction conditions. Three types of cycloadducts are proposed to be formed in reactions of azines with such 1,3-N,C-dinucleophiles as acetamidines and acetimino esters. Ortho-cyclization products can usually be isolated, while meta- and para-bridged cycloadducts are unstable and are often transformed into other heterocyclic systems. Their presence as intermediates can, however, often is rationalized by spectroscopic methods or 15N-labeling studies. Many of the reactions discussed provide a very convenient synthetic route to a great variety of azine derivatives. It seems to be a very interesting and promising area of heterocyclic chemistry and there is no doubt that further investigations into this field also allow new syntheses of useful compounds to be developed \\\\expert2\\nbo\\Advances in Heterocyclic Chemistry\\1988. V. 43 (C). P. 301-353.pdf |