C 98 Cyclization of N-alkylazinium cations with bifunctional nucleophiles. 14. Reaction of quinoxalinium salts with mono- and N,N′-disubstituted amidines / L. M. Naumova, V. N. Charushin, O. N. Chupakhin, G. G. Izmailova // Chemistry of Heterocyclic Compounds. - 1985. - Vol. 21, № 3. - С. 326-331. - Bibliogr. : p. 330-331 (7 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): BENZAMIDINES -- QUINOXALINUM SALTS Аннотация: Monosubstituted benzamidines undergo cyclization with quinoxalinum salts to give 1,2-disubstituted 3a,4,9,9a-tetrahydroimidazo[4,5-b]quinoxalines. The participation in similar cyclizations of N,N′-disubstituted amidines with a CH-active group in the a position leads to 3a,4,9,9a-tetrahydropyrrolo[2,3-b]quinoxalines \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1985, v.21, N 3, p. 326.pdf |