Вид документа : Статья из журнала Шифр издания : 54/U 50 Автор(ы) : Korotaev V.Yu., Barkov A. Yu., Slepukhin P. A., Kodess M. I., Sosnovskikh V. Ya. Заглавие : Uncatalyzed reactions of alfa-(trihaloethylidene)nitroalkanes with push-pull enamines: a new type of ring-ring tautomerism in cyclobutane derivatives and the dramatic effect of the trihalomethyl group on the reaction pathway Место публикации : Tetrahedron Letters. - 2011. - In Press, Accepted Manuscript, 30 august 2011. - С. 1-15 Примечания : Bibliogr. : p. 10-12 (15 ref.) ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A new type of ring-ring isomerism, which consists of the reversible transformation of cyclobutane derivatives into substituted 1,2-oxazine N-oxides was found and studied by NMR spectroscopy and X-ray diffraction analysis. The starting materials were prepared by the stereoselective reaction of ?-(trifluoroethylidene)nitroalkanes, which react with ethyl ?-morpholino- and ?-piperidinocrotonates at the more nucleophilic ?-position, whereas the reaction of ?-(trichloroethylidene)nitroalkanes proceeds at the ?-methyl group to give the corresponding linear products Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Korotaev, V.Yu.; Barkov, A. Yu.; Slepukhin, P. A.; Kodess, M. I.; Кодесс Михаил Исаакович; Sosnovskikh, V. Ya.