Вид документа : Статья из журнала Шифр издания : 54/S 83 Автор(ы) : Korotaev V.Yu., Sosnovskikh V. Ya., Barabanov M.A., Yasnova E.S., Ezhikova M. A., Kodess M. I., Slepukhin P. A. Заглавие : Stereoselective hetero-Diels–Alder reaction of 3-nitro-2-trihalomethyl-2H-chromenes with 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions Место публикации : Tetrahedron. - 2010. - Vol. 66, № 6. - С. 1404-1409 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 3-Nitro-2-trifluoro(trichloro)methyl-2H-chromenes undergo heterodiene cycloaddition to 2,3-dihydrofuran and ethyl vinyl ether under solvent-free conditions producing novel cyclic nitronates with high stereoselectivity and in good yields. 3,6-Dinitro-2-trifluoromethyl-2H-chromene reacts with two molecules of ethyl vinyl ether to give the tandem [4+2]/[3+2] cycloaddition adduct in 48% yield. The stereochemistry of the products was established based on 2D COSY, NOESY, HSQC, and HMBC experiments and an X-ray diffraction study Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Korotaev, V.Yu.; Sosnovskikh, V. Ya.; Barabanov, M.A.; Yasnova, E.S.; Ezhikova, M. A.; Kodess, M. I.; Кодесс Михаил Исаакович; Slepukhin, P. A.