Copper(II)/polyimide linked covalent organic framework as a powerful catalyst for the solvent‐free microwave irradiation‐based synthesis of 2,4,5‐trisubstituted imidazoles

Abstract

AbstractCopper(II)/polyimide‐linked covalent organic frameworks under solvent‐free and microwave‐assisted conditions have been used in an efficient one‐pot protocol for the preparation of 2,4,5‐trisubstituted imidazoles via benzil, aromatic aldehydes and ammonium acetate. By applying solvent‐free conditions and microwave irradiation, three‐component condensation provides safe operations, low pollution, quick access to products, and an easy set‐up. As a result of its reusability, the catalyst can also be reutilized for many runs without missing any activity.