Synthesis and Characterization of Benzimidazolium Salts Bearing Triazole Groups

Year 2018, Volume: 14 Issue: 1, 57 - 60, 30.03.2018

Deniz Demir Atlı

https://doi.org/10.18466/cbayarfbe.346566

Cited By: 1

Abstract

A propargyl-functionalized salt, 1-(2-methoxyethyl)-3-(prop-2-ynyl)benzimidazolium
bromide (1), was prepared. 1-(2-methoxyethyl)-3-[(1-phenyl-1H-1,2,3-triazol-4-yl)methyl]benzimidazolium
hexafluorophos- phate (2) and 1-(2-methoxyethyl)-3-[(1-(4-nitrophenyl)-1H-1,2,3-triazol-4-yl)methyl]benzimidazolium
hexafluorophosphate (3) were
obtained by Cu(I) catalyzed azide-alkyne cycloaddition reaction of 1 with corresponding azides. Compound 3 was transformed to 1-(2-methoxyethyl)-3-[(1-(4-aminophenyl)-1H-1,2,3-triazol-4-yl)methyl]benzimidazolium
hexafluorophosphate (4) by reduction
reaction with hydrazine monohydrate. The structures of these  propargyl- and 1,2,3-triazolyl-functionalized
benzimidazolium salts were elucidated by FT-IR, ¹H NMR, ¹³C
NMR and elemental analysis methods.

Keywords

Benzimidazolium, N-heterocyclic carbene, Click chemistry, triazole

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