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 |