a new strategy for the synthesis of dihydropyrano[c]chromene using zinc oxide/copper oxide as a nano and efficient catalyst

in recent years, dihydropyrano[3.2c]-chromene derivatives have attracted much attention among many researchers, due to their wide range of biological and pharmaceutical properties, including anticoagulant, diuretic, and anti-cancer. mild conditions, high speed and short reaction time, simplicity of product separation process, high efficiency and purity of synthesized derivatives are the advantages of the proposed method.