I-83 ipso- and tele-Substitution in reactions of 3-chloro-1-ethyl-2-R-pyrazinium salts with C-nucleophiles [Electronic resource] / P. A. Slepukhin, G. L. Rusinov, V. N. Charushin, M. I. Kodess, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2003. - Vol. 52, № 3. - P689-694 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reactions of 2,3-dichloro- and 3-chloro-1-ethyl-2-morpholinopyrazinium tetrafluoroborates with compounds containing the active methylene group were studied. The reactions with malonodinitrile and cyanoacetic ester afford products of ipso-substitution at position 2, while 1,3-dicarbonyl compounds produce products of tele-substitution of the Cl atom at the C(3) atom due to the attack of a nucleophile to position 6 of the pyrazine cycle \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2003, 52 (3), 689.pdf |
S 98 Synthesis and transformations of cyanomethyl-1,2,4,5-tetrazines [Electronic resource] / S. G. Tolshchina, R. I. Ishmetova, A. V. Ignatenko, A. V. Korotina, P. A. Slepukhin, V. N. Charushin // Chemistry of Heterocyclic Compounds. - 2013. - Vol.49, №4. - P604-617. - Библиогр.: с. 617 (18 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): S-TETRAZINE -- MALONODINITRILE -- NUCLEOPHILIC SUBSTITUTION Аннотация: Derivatives of s-tetrazine containing malonodinitrile, ethyl cyanoacetate, and 1,3-indanedione fragments were synthesized by the nucleophilic substitution of heterocyclic groups in 3,6-diazolyl-1,2,4,5-tetrazines. Coordination compounds of the cyanomethyltetrazine anion with Cu+, Mn2+, and the tetrathiafulvalene radical cation were obtained, and their structures were determined. A transformation of cyanomethyltetrazines to pyrrolo[1,2-b][1, 2, 4, 5]tetrazines catalyzed by metal cations was discovered \\\\expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2013, v.49, N 4, p. 604-617.pdf |