Magnetic RHA nanocomposite as a magnetically separable catalyst for the synthesis of polyhydroquinolines

In this study, rice husk ash (RHA) was prepared and then Magnetic RHA nanocomposite was prepared and characterized using FT-IR, EDX and SEM methods. Then, the use of Magnetic RHA nanocomposite as a green nanocatalyst for the synthesis of polyhydroquinolines through multi-component condensation of aromatic aldehydes, ethyl acetoacetate, ammonium acetate, and dimedone in solvent-free conditions was investigated. The procedure gave the products in excellent yields during all reaction times. Also this catalyst can be reused for several times without loss of its catalytic activity.