Catalyst-free one-pot synthesis of benzimidazoles from 1,2-diaminoarenes and alcohols

A new and efficient protocol is described for the aryl alcohols and 1,2-diaminoarenes. The yields the present method is utilizing alcohols instead solvent- and catalyst-free conditions, offering an one-pot synthesis of benzimidazoles from a variety of were ranging from moderate to excellent. Moreover, of aldehydes and the reactions are carried out under environmentally benign process. (C) 2014 Elsevier Ltd. All rights reserved.