Synthesis of Dihydropyrano[c]chromene derivatives using nano CeO۲/Al۲O۳ as an efficient catalyst

Derivations of Dihydropyrano[c]chromene have received great attention from researchers due to various biological and pharmaceutical applications. Because of the considerable significance of these compounds, various methods with different conditions and catalysts have been used to synthesize them. However, some of these methods have disadvantages such as low efficiency, long reaction time, using toxic solvent, etc.In this research, the performance of Cerium oxide/aluminum oxide for synthesizing the derivatives of dihydropyrano (c) chromene as an effective and nonhomogeneous catalyst has been investigated. This method contains numerous advantages which are discussed in the following.