Formation of zwitterionic salts via three-component reaction of benzimidazolium bromides, aromatic aldehydes and 1, 3-indanedione. Issue 87 (8th September 2016)

• Record Type: Journal Article
• Authors: Jin, Gong; Sun, Jing; Yan, Chao-Guo
• Is Part Of: RSC advances. Volume 6:Issue 87(2016)
• Page Start: 84379
• Page End: 84387
• Publication Date: 2016-09-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra16838h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The three-component reaction in ethanol in the presence of triethylamine as base catalyst resulted in the unusual charge-separated zwitterionic salts in good yields. Abstract : The three-component reaction of N -butyl- N ′-phenacylbenzimidazolium bromide, aromatic aldehydes and 1, 3-indanedione in ethanol in the presence of triethylamine as base catalyst resulted in the unusual charge-separated zwitterionic salts in good yields. Similar reactions with N -butyl- N ′-(4-nitrobenzyl)- and N -butyl- N ′-ethoxycarbonylmethylbenzimidazolium bromide also afforded the corresponding zwitterionic salts. Furthermore, 1 H NMR spectra and single crystal structures indicated that the zwitterionic salts usually exist as two kinds of conformational isomers due to hindered interconversion of the different conformations.