Sodium Saccharin as an Effective Catalyst for Rapid One-pot Pseudo-five Component Synthesis of Dihydropyrano[2,3-g]chromenes under Microwave Irradiation

摘要

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.