benzimidazolium salts have been synthesized and fully characterized by multinuclear NMR spectroscopy. The benzimidazolium salts occur as intermediates in various 1,3-dipolarcycloadditions and they are also useful as starting materials in such cycloadditions. Graphic abstract
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-componentreactions of in-situ-formed N-benzylbenzimidazoliumsalts, aromaticaldehydes, and activemethylenecompounds in the presence of triethylamine showed very interesting moleculardiversity. 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
Molecular Diversity of Three-Component Reactions of N-Benzylbenzimidazolium Salts, Isatin, and Malononitrile or Ethyl Cyanoacetate
作者:Li Hui、Hong-Yan Li、Chao-Guo Yan
DOI:10.1002/ejoc.201200269
日期:2012.6
The three-componentreactions of N-benzylbenzimidazoliumsalts, isatins, and malononitrile or ethyl cyanoacetate showed very interesting moleculardiversity depending on the structures of the benzimidazolium salts. The reactions of N-benzyl-N′-p-nitrobenzylbenzimidazolium salts gave a series of zwitterionic salts in good yields. Under similar reaction conditions the reactions of N-benzyl-N′-phenacylbenzimidazolium
Synthesis, structural characterization and properties of new N-heterocyclic carbene Ag(I) complexes
作者:Ravada Kishore、Samar K. Das
DOI:10.1016/j.molstruc.2013.08.051
日期:2013.12
The syntheses and properties of new N-heterocyclic carbene complexes [1-(2,3,5,6-tetra methyl benzyl)-3-benzylbimy}AgCl] (2a), 11-(benzyl)-3-benzylbimy}(2)Ag][BF4] (2b), [1-(benzyl)-3-butylbimy}AgBr](2) (2c), [1-(benzyl)-3-(4-nitro-benzyl)bimy}AgBr] (2d), [1-(benzyl)-3-(4-bromo-benzyl)bimy)AgBr] (2e), [1-(benzyl)-3-(4-nitro-benzyl)bimy}(2)Ag][BF4] (2f), [1-(benzyl)-3-(4-bromo-benzyl)bimy](2)Ag][BF4] (2g) (bimy = benzimidazol-2-ylidene), and [1-(10-bromo-9-anthracenylmethyl)-3-butylimy)AgBr] (2h) (imy = imidazol-2-ylidene) have been described. Compounds 2a-2h have been characterized by H-1 NMR-, UV-vis- LC/MS-spectral studies and elemental analysis. Compounds 2a-2c and 2h are unambiguously characterized by single crystal X-ray crystallography. Compound 2h shows solution emission at room temperature. (C) 2013 Elsevier B.V. All rights reserved.