Molecular Diversity of the Three-Component Reactions of N-Benzylbenzimidazolium Salts, Aromatic Aldehydes, and Active Methylene Compounds
作者:Li Hui、Yu-Xiu Jin、Jin-Xiu Wang、Chao-Guo Yan
DOI:10.1002/ejoc.201101199
日期:2011.12
The three-component reactions of in-situ-formed N-benzylbenzimidazolium salts, aromatic aldehydes, and active methylene compounds in the presence of triethylamine showed very interesting molecular diversity. The reactions with Meldrum's acid or barbiturate in acetonitrile gave a series of the novel zwitterionic salts in high yields. Under similar reaction conditions, the reactions with malononitrile
在三乙胺存在下原位形成的 N-苄基苯并咪唑鎓盐、芳香醛和活性亚甲基化合物的三组分反应显示出非常有趣的分子多样性。与 Meldrum 酸或巴比妥酸盐在乙腈中的反应以高产率得到了一系列新型两性离子盐。在类似的反应条件下,与丙二腈或氰基乙酸乙酯的反应以良好的收率和前所未有的区域选择性产生官能化的吡咯并[1,2-a]苯并咪唑。