Synthesis of Pyranopyrazoles under Eco-friendly Approach by Using Acid Catalysis

[GRAPHICS] Multicomponent synthesis of pyranopyrazole derivatives by using montmorillonite K-10 as a reusable green acid catalyst under eco-friendly method in the presence of eco-friendly solvent leads to novel protocol. Moreover, catalyst could be reused five times for the reaction without noticeable loss of activity. The scope of this path was to develop new synthetic molecules by using green catalysis for further screenings such as starting molecules for organic electronic materials and biological assays.