An efficient and one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles catalyzed by InCl3·3H2O
作者:Saikat Das Sharma、Parasa Hazarika、Dilip Konwar
DOI:10.1016/j.tetlet.2008.02.053
日期:2008.3
InCl3·3H2O was found to be a mild and effective catalyst for the efficient, one-pot, three component synthesis of 2,4,5-trisubstituted imidazoles at room temperature. Moreover, the utility of this protocol was further explored conveniently for the one-pot, four component synthesis of 1,2,4,5-tetrasubstitutedimidazoles in high yields.
New Method for Synthesis of Multi-substituted Imidazoles
作者:Adel A. Marzouk、Shaaban K. Mohamed、Enas T. Aljohani、Antar A. Abdelhamid
DOI:10.1002/jhet.3215
日期:2018.7
Here, we reported two methods for the synthesis of multi‐substituted imidazoles, firstly via four‐component cyclocondensation reaction of benzil, aliphatic amines (allylamine or pentylamine), and aromatic aldehyde and ammonium acetate. Using an ionic liquid catalyst namely, diethyl ammonium hydrogen sulfate, and under solvent‐free conditions. Secondly, via the alkylation of synthesized NH imidazoles