Citrate trisulfonic acid: A heterogeneous organocatalyst for the synthesis of highly substituted Imidazoles
作者:Elham Kanaani、Masoud Nasr-Esfahani
DOI:10.1002/jccs.201800015
日期:2019.1
Citrate trisulfonic acid (CTSA), as a novel recyclable and eco‐benign organocatalyst, was employed for the efficient and one‐pot synthesis of trisubstituted imidazoles and tetrasubstituted imidazoles using aldehydes, ammonium acetate or aniline, and benzoin, benzyl, or 9,10‐phenanthrenequinone under solvent‐free conditions providing high to excellent yields. CTSA is easily prepared via the reaction