One-pot, three-component synthesis of pyranocoumarins containing an aroyl group

Abstract

An expeditious method to prepare pyranocoumarins containing an aroyl group by the three-component reaction of 4-hydroxycoumarin with arylglyoxals and malononitrile is described. The reaction is efficiently catalyzed by Mohr's salt, and the products were obtained in good to excellent yields with high purity. The method is simple, inexpensive, and environmentally friendly.