Вид документа : Статья из журнала Шифр издания : 54/C 98 Автор(ы) : Petrova G. M., Ponizovskii M. G., Charushin V. N., Aleksandrov G. G., Sidorov E. O., Chupakhin O. N. Заглавие : Cyclizations of N-alkyl-substituted azinium cations with bifunctional nucleophiles. 28. Orientation of the nucleophile in the reaction of quinoxalinium salts with indan-1,3-dione [Электронный ресурс] Место публикации : Chemistry of Heterocyclic Compounds. - 1990. - Vol. 26, № 5. - С. 565-572 Систем. требования: http://link.springer.com/article/10.1007/BF00487435 Примечания : Bibliogr. : p. 572 (12 ref.). - 26.10.15 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): quinoxalinum salts--c-nucleophiles --azinium cations Аннотация: In reactions with quinoxalinium salts in alcoholic-base media indan-1,3-dione acts as a C nucleophile, adding at the 2 or 3 position of the heterocycle to give the corresponding ylidene derivatives; attack by the nucleophile at the C(3) atom (the Β position relative to the quaternary nitrogen atom) is preceded by addition of alcohol at the a position. Dissociative substitution at the C(2) atom in 2-alkoxy-3-(1,3-dioxoindan-2-ylidene)-1,2,3,4-tetrahydroquinoxalines by another nucleophile makes it possible to regard lyate complexes as probable intermediates in cyclizations of 1,4-diazinium salts with dinucleophiles. Доп.точки доступа: Petrova, G. M.; Ponizovskii, M. G.; Charushin, V. N.; Aleksandrov, G. G.; Sidorov, E. O.; Chupakhin, O. N.