Вид документа : Статья из журнала Шифр издания : 54/R 30 Автор(ы) : Saloutina L. V., Zapevalov A. Ya., Saloutin V. I., Kodess M. I., Slepukhin P. A. Заглавие : Reactions of internal perfluoroolefin oxides with urea [Electronic resource] Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2009. - Vol. 45, № 6. - С. 865-871 Систем. требования: http://www.springerlink.com/content/4123q16k23607581/fulltext.pdf Примечания : Bibliogr. : p. 871 (19 ref.). - 31.10.2011 г. ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Internal perfluoroolefin oxides reacted with urea to give, depending on the solvent nature, two types of new fluorine-substituted nitrogen-containing heterocycles. 1,5-Bis(perfluoroalkyl)tetraazabicyclo[3.3.0]octane-3,7-diones were formed in dimethyl sulfoxide, N,N-dimethylacetamide, and acetonitrile, while the reaction in dioxane resulted in the formation of unexpected products, 2-amino-5-fluoro-4,5-bis(perfluoroalkyl)-4,5-dihydrooxazol-4-ols, existing mainly as trans isomers. trans Orientation of perfluoroalkyl substituents in these compounds was determined by analysis of 19F-19F spin-spin coupling constants in the 19F NMR spectra. The molecular structure of trans-2-amino-5-fluoro-4,5-bis(trifluoromethyl)-4,5-dihydrooxazol-4-ol was studied by X-ray analysis. Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Saloutina, L. V.; Салоутина Людмила Васильевна; Zapevalov, A. Ya.; Запевалов Александр Яковлевич; Saloutin, V. I.; Kodess, M. I.; Кодесс Михаил Исаакович; Slepukhin, P. A.