F 70 Fluoro-containing heterocycles: XIV. Cyclic adducts of 6-fluoro-7-azidoquinoxaline and their transformation products [Electronic resource] / N. N. Mochul`skaya, E. N. Nagibina, Yu. S. Volchenkova, L. P. Sidorova, V. N. Charushin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 11. - P1694-1701. - Библиогр. : с. 1701 (18 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The possibility of a structural modification of quinoxalines through 1,3-dipolar cycloaddition of 7-azido-6-fluoroquinoxaline to norbornenes, enamines of cyclic ketones, and dimethyl acetylenedicarboxylate was demonstarated. The stability of 1,2,3-triazoline adducts was studied and the structure of the products of their molecular rearrangements was established. The cycloadduct of azide with cyclohexanone enamine undergoes azapinacolone rearrangement involving a contruction of the cycloalkane ring by one member affording amidine of cyclopentanecarboxylic acid. The triazoline adduct of the azide with dicyclopentadiene as a result of the rearrangement affords the corresponding aziridinoquinoxaline. \\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (11), 1694.pdf |
C 57 Chupakhin, O. N. Reactions of N-alkylazinium cations. Reaction of acridinium salts with enamines [Electronic resource] / O. N. Chupakhin, V. N. Charushin, E. O. Sidorov // Chemistry of Heterocyclic Compounds. - 1979. - Vol. 15, № 5. - P541-544. - Bibliogr. : p. 544 (8 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ACRIDINIUM SALTS -- ENAMINES -- N-ALKYLAZINIUM CATIONS Аннотация: The reaction pyridinium N-methylazinium salts and their benzo analogs - quinolinium, isoquinolinium, and acridinium ions - with enamines was investigated. Acridanyl-substituted enamines, their iminium salts, and the corresponding ketones were obtained by reaction of the N-methylacridinium salts with the enamines in dimethyl sulfoxide at room temperature. The quinolinium and isoquinolinium salts have lower activities; the N-methylpyridinium cation does not react at all under the indicated conditions. \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1979, v.15, N 5, p.541.pdf |
C 47 Charushin, V. N. Ring transformations of 5-nitropyrimidine via inverse diels-alder reactions [Electronic resource] / V. N. Charushin, Y. C. Van der Plas // Tetrahedron Letters. - 1982. - Vol. 23, № 38. - P3965-3968. - Bibliogr. : p. 3968 (17 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 5-NITROPYRIMIDINES -- ENAMINES -- DIELS-ALDER REACTIONS Аннотация: 5-Nitropyrimidine undergoes inverse Diels-Alder cycloadditions with ketene_N,N-, -O,O- acetals and enamines resulting in pyridine derivatives. The 1H NMR evidence for the 1-N,N-diethyl-aminopropyne cycloadduct formation is presented \\\\expert2\\nbo\\Tetrahedron Letters\\1982, v 23, p.3965.pdf |