F 98 Fused polycyclic nitrogen-containing heterocycles. 21. Condensation of 4-hydroxy-3,5-diphenyl-2-phenyliminothiazolidine with 5-fluoro-4-morpholino- and 4-(4-methylpiperazino)-1,2-phenylenediamines [Electronic resource] / V. A. Mamedov, N. A. Zhukova, T. N. Beschastnova, A. A. Balandina, A. T. Gubaidullin, S. K. Kotovskaya, Sh. K. Latypov, Ya. A. Levin, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2009. - Vol. 58, № 1. - P203-211 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The condensation of 4-hydroxy-3,5-diphenyl-2-phenyliminothiazolidine with 5-fluoro-4-morpholino- and 5-fluoro-4-(4-methylpiperazino)-1,2-phenylenediamines leads to region-isomeric thiazolo[3,4-a]quinoxalines differing in substituents in positions 7 and 8 of the benzene ring. From the ratio of isomers formed it follows that the mesomeric effect of a fluorine atom in 1,2-phenylenediamines is comparable with the influence of an aminosubstituent \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2009, 58 (1), 203-211.pdf |