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 |