An efficient and general method has been described for the synthesis of quinoxalines by the reaction of 1,2-diamines with phenacyl bromides in the presence of DABCO. The method is suitable for the preparation of functionalized quinoxalines. (C) 2010 Elsevier Ltd. All rights reserved.
Green and Eco-Friendly Synthesis of Quinoxalines by Brönsted Acidic Ionic Liquid Supported on Nano-SiO<sub>2</sub> under Solvent-Free Conditions
using a reusablecatalyst for the synthesis of these heterocyclic compounds is highly desirable. At the same time, there is an ongoing demand for the development of green and ecofriendly methods in organic synthesis. Due to the favorable properties of ionicliquids, such as high polarity, high thermal and chemical stability, non-flammability and low vapor pressure, the application of ionicliquids as green