One-Pot Synthesis of 2-Amino-5,10-dihydro-5,10-dioxo-4-phenyl-4<i>H</i>-benzo[g]chromene Derivatives Catalyzed by ZnCl₂

Abstract

Abstract An efficient one-pot synthesis of 2-amino-5,10-dihydro-5,10-dioxo-4-phenyl-4H-benzo[g]chromene derivatives has been achieved by the reaction of 2-hydroxynaphthalene-1,4-dione, cyanothioacetamide, and aromaticaldehyde in EtOH at room temperature catalyzed by ZnCl2. The structures of the products were characterized by infrared, 1H NMR, mass, and elemental analysis.