作者:A. Risaliti、M. Forchiassin、E. Valentin
DOI:10.1016/s0040-4020(01)82495-9
日期:1968.1
the same enamine reacted with 2-nitropropene to give an enaminic mixture, where the less substituted alkylated isomer appeared to be the minor component. Analogous behaviour was shown by piperidine and pyrrolidene enamines. The mechanism and the stereochemistry of these reactions have been discussed. The formation of diadducts of a different nature from morpholine and pyrrolidine enamines with excess
通过环己酮的吗啉,哌啶和吡咯烷烯胺与1-硝基丙烯的反应获得含有三取代双键的烯胺。在相同的烯胺与2-硝基丙烯反应中获得了不同的结果。1-N-吗啉代-环己烯与2-硝基丙烯在乙醚中于0°发生环加成反应,生成恶嗪衍生物。产品的结构由光谱和化学证据确定。在0°的乙腈中或在室温的乙醚中,相同的烯胺与2-硝基丙烯反应生成烯胺混合物,其中较少取代的烷基化异构体似乎是次要组分。哌啶和吡咯烷烯胺显示出类似的行为。已经讨论了这些反应的机理和立体化学。