Answers are grounded in this paper and cite their sources.
A simple and efficient procedure for the synthesis of 2-substituted benzimidazoles has been developed by a one-pot reaction of o-phenylenediamine with aromatic aldehydes in the presence of an ionic liquid, 1-methyl-3-pentylimidazolium tetrafluoroborate, [pmim]BF4 at room temperature in open air without any organic solvent. The ionic liquid is recycled. A remarkable influence of the substituent on the imidazolium unit of the ionic liquid on the outcome of the reaction is observed.
No takes yet. Share an insight, caveat, or question.
Saha et al. (2009) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: