Title:A Mild and Rapid Synthesis of 2-aryl Benzimidazoles by using SO42−/ZrO2-TiO2
as a Heterogeneous Catalyst
Volume: 20
Issue: 6
Author(s): Sushil V. Shelke, Sambhaji T. Dhumal, Tejshri R. Deshmukh and Meghshyam K. Patil*
Affiliation:
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University Sub-campus, Osmanabad- 413 501,
MS, India
Keywords:
SO42−/ZrO2-TiO2 , 2-Aryl benzimidazoles, recyclable, heterogeneous catalyst, cyclocondensation, benign GERD.
Abstract: Herein, we have reported an efficient synthesis of 2-aryl benzimidazoles by reacting ophenylenediamines
and substituting aromatic aldehydes using SO42−/ZrO2-TiO2 as a heterogeneous
catalyst. This methodology is straightforward to obtain 2-aryl benzimidazoles with good to
excellent yields. It has been performed in ethanol as a green solvent. The reported protocol has
some advantages such as a safe and reusable heterogeneous catalyst, without any need for column
chromatography to obtain desired products. The catalyst can be recovered for up to five catalytic
cycles without significant loss in the catalytic activity.