Вид документа : Статья из журнала Шифр издания : 54/R 30 Автор(ы) : Sosnovskikh V. Ya., Irgashev R. A., Moshkin V. S., Kodess M. I. Заглавие : Reaction of 3-(polyfluoroacyl)chromones with hydrazines: new regioselective synthesis of RF-containing pyrazoles [Electronic resource] Место публикации : Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2008. - Vol. 57, № 10. - С. 2146-2155 Систем. требования: http://www.springerlink.com/content/t50k237m543q111u/fulltext.pdf Примечания : 27.10.2011 г. ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reactions of 3-(polyfluoroacyl)chromones with hydrazine, methyl-and phenylhydrazines proceed by the mechanism of nucleophilic 1,4-addition with subsequent pyrone ring opening and heterocyclization at the polyfluoroacyl group to 4-(2-hydroxyaroyl)-3-polyfluoro-alkylpyrazoles or at the aroyl group to 4-polyfluoroalkyl-2,4-dihydrochromeno[4,3-c]pyrazol-4-ols. Regiochemistry of the products was established based on the data of 2D-experiments HSQC, HMBC, and NOESY and X-ray diffraction study Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Sosnovskikh, V. Ya.; Irgashev, R. A.; Moshkin, V. S.; Kodess, M. I.; Кодесс Михаил Исаакович