C 98 Cyclization of n-alkylazinium cations with bisnucleophiles. 4. Regio- and stereospecificity of the reactions of β-diketones with quinoxalinium salts and their aza and benzo analogs [Electronic resource] / V. N. Charushin, M. G. Ponizovskii, O. N. Chupakhin, A. I. Rezvukhin, G. M. Petrova, Yu. A. Efremov // Chemistry of Heterocyclic Compounds. - 1981. - Vol. 17, № 11. - P1129-1134. - Bibliogr. : p. 1134 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): QUINOXALINIUM -- PYRAZINIUM SALTS -- BISNUCLEOPHILES Аннотация: The reactions of substituted quinoxalinium, benzo[g]- and benzo[f]quinoxalinium, and pyrido[2,3-b]pyrazinium salts with anions of β-dicarbonyl compounds give furo[2,3-b]-annelated systems with strictly determined regio- and stereoorientations \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1981, v.17, N 11, p.1129.pdf |