Sodium saccharin as an effective catalyst for rapid one-pot pseudo-five component synthesis of dihydropyrano[2,3-g]chromenes under microwave irradiation

Abstract

One-pot microwave-assisted synthesis of dihydropyrano[2,3-g]chromenes catalyzed by sodium saccharin as an efficient, mild and green catalyst was studied. The method presented is a safe and eco-friendly approach for the multicomponent synthesis of dihydropyrano[2,3-g]chromene derivatives with many merits including short reaction times (in comparison with other reported results), high yields and easy work up.