Nitrone Cycloadditions to 1,2-Diphenylcyclopropenes and Subsequent Transformations of the Isoxazolidine Cycloadducts
作者:Vyacheslav V. Diev、Oksana N. Stetsenko、Tran Q. Tung、Jürgen Kopf、Rafael R. Kostikov、Alexander P. Molchanov
DOI:10.1021/jo702379d
日期:2008.3.1
occurs with the formation of expected “normal” cycloadducts (with N-methylnitrones) and products of their subsequent transformations. Among them are corresponding α-acetophenyl aziridines and tetra (or penta) -arylpyrroles. Aziridines and the normal cycloadducts can be also thermally converted to such arylpyrroles with moderate to good yields. Substitution at the C3 position of cyclopropenes by an electron
的1,3-偶极环加成Ç -芳基,ñ -芳基(或ñ -甲基)硝酮与一些1,2- diphenylcyclopropenes在C取代的3位置与预期的“正常” cycloadducts的形成(与发生ñ -甲基硝酮)及其后续转化的产物。其中有相应的α-乙酰苯基氮丙啶和四(或五)-芳基吡咯。氮丙啶和正常的环加合物也可以以中等至良好的产率热转化为这种芳基吡咯。电子受体基团取代环丙烯的C 3位会降低环丙烯的反应性。