Umlagerungen von 2,5-diarylsubstituierten dicyano[7,7-dimethyl-3,4-diazabicyclo[4.1.0]hept-2,4-dien-3-ium-3-yl]methaniden 3 in protischen solventien
作者:Peter Riebel、Andreas Weber、Theodor Troll、Jürgen Sauer、Josef Breu、Heinrich Nöth
DOI:10.1016/0040-4039(96)00089-5
日期:1996.3
The title compound 3 rearranges under very mild conditions to form 4,4-dicyano-8,8-dimethyl-2,6-diphenyl-3,5-diazabicyclo[5.1.0]octa-2,5-diene 5 (in alcohols) or dicyano[4-aroyl-5,5-dimethyl-2-aryl-1-azacyclopenta-1,3-diene-1-ium-1-yl]methanide 6 (in acetic acid). Azomethine ylide 6 adds to 2π-systems to form (3 + 2)-cycloadducts.
标题化合物3个重新排列非常温和的条件下,以形成4,4-二氰基-8,8-二甲基-2,6-二苯基-3,5-二氮杂双环[5.1.0]辛-2,5-二烯5(在醇中)或二氰基[4-芳基-5,5-二甲基-2-芳基-1-氮杂环戊-1,3-二烯-1-基-1-基]甲烷6(在乙酸中)。甲亚胺叶立德6加成2π系统形成(3 + 2)-环加合物。