A simple and efficient procedure for the synthesis of benzimidazoles using air as the oxidant
作者:Songnian Lin、Lihu Yang
DOI:10.1016/j.tetlet.2005.04.101
日期:2005.6
Direct one-step synthesis of various benzimidazoles from phenylenediamines and aldehydes is described using air as the oxidant. The salient features of this method include a simpleprocedure, mild conditions, no coupling agents or commercial oxidants/additives used, no waste produced (only by-product being water), easy purification, and high generality.
POCl<sub>3</sub>-mediated synthesis of 2-substituted benzimidazolyl-coumarin, benzimidazolyl-indole, and styrylbenzimidazole derivatives
作者:Veerendra Kumar A. Kalalbandi、J. Seetharamappa
DOI:10.1080/00397911.2016.1160412
日期:2016.4.2
ABSTRACT 2-Substituted benzimidazolyl heterocycles and styrylbenzimidazoles have been synthesized by the reaction of substituted o-phenylenediamine with different heterocyclic carboxylic acids and cinnamic acid respectively in the presence of POCl3 as a solvent and catalyst. The proposed reaction has advantageous features of good yields, short reaction times, and operational simplicity. In addition
A simple and efficient procedure for the synthesis of benzimidazoles using trichloroisocyanuric acid (TCCA) as the oxidant
作者:Mohammad A. Bigdeli、Hamideh Dostmohammadi、Firouzeh Nemati、Gholam Hossein Mahdavinia
DOI:10.1002/jhet.5570450443
日期:2008.7
A Direct one step synthesis of various benzimidazoles from 3,4-diaminotoluene and benzaldehydes is described usingTCCA as the oxidant. The salient features of this method include simpleprocedure, mild condition, no waste products, easy separation, low reaction times and generality.