DBU-Based Ionic-Liquid-Catalyzed Carbonylation of o-Phenylenediamines with CO2 to 2-Benzimidazolones under Solvent-Free Conditions
Citations Over TimeTop 10% of 2013 papers
Abstract
Herein, a new route was presented to synthesize 2-benzimidazolones via the carbonylation of o-phenylenediamines with CO2 catalyzed by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-based ionic liquids under solvent-free conditions. DBU acetate ([DBUH][OAc]) displayed high efficiency for catalyzing the reactions of CO2 with o-phenylenediamines, and a series of benzimidazolones were obtained in high yields. It was demonstrated that [DBUH][OAc] could serve as a bifunctional catalyst for these reactions with the cation activating CO2 and the anion activating o-phenylenediamines. This protocol provides an effective and environmentally friendly alternative route for production of benzimidazolones, and extends the chemical utilization of CO2 in organic synthesis as well.
Related Papers
- → A bifunctional luminescent europium–organic framework for highly selective sensing of nitrobenzene and 4-aminophenol(2017)24 cited
- → Biodegradable Ionic Liquids: Selected Synthetic Applications(2007)36 cited
- → Coupling rules for bifunctional pair sites(2023)5 cited
- → Determination of bifunctional compounds. Part IV. 4-iodobutaneboronic acid as a selective reagent for the trace determination of bifunctional compounds(1979)17 cited
- → Correction: Effects of the support on bifunctional one-step synthesis of methylal via methanol oxidation catalysed by Fe–Mo-based bifunctional catalysts(2022)