已开发出一种新的快速简便的方法,用于芳族醛和二醛与丙二腈和溴化氰的单锅反应,可在极短的时间内以极高的收率提供全取代的3-芳基环丙烷-1,1,2,2-四腈。大约5秒钟)。通过IR,1 H NMR,13 C NMR,质谱和X射线晶体学技术对结构进行了表征。对于这些化合物,晶体学数据在固体情况下在镜像中显示出两种结构,在溶液中显示出一种不同的结构。讨论了反应机理。
Solvent-free, one-pot synthesis of pentasubstituted cyclopropanes in the presence of BrCN and EtONa by milling
作者:Nader Noroozi Pesyan、Mohammad Rezaee
DOI:10.1007/s00706-014-1180-2
日期:2014.7
A solvent-free, one-pot process for the preparation of pentasubstituted 3-arylcyclopropane-1,1,2,2-tetracarbonitriles in the presence of solid sodium ethoxide by milling was achieved. The one-pot reaction of aromatic aldehydes and dialdehydes with malononitrile, cyanogen bromide, and solid sodium ethoxide afforded pentasubstituted cyclopropanes in excellent yield under solvent-free conditions. The structures were characterized and confirmed by IR, H-1 NMR, C-13 NMR spectroscopy, and mass spectrometry. Its advantages are easy workup, mild reaction conditions, and excellent yields.