One-pot synthesis of 1-amidoalkyl-2-naphthols catalyzed by nano-SnCl4•SiO2

Nano SnCl4.SiO2as a reusable and efficient catalyst was prepared from reaction of SnCl4 with nano silica gel at room temperature. The structure of nanoSnCl4.SiO2evaluated by ATR, and XRD. The SEM photograph of this catalyst improves the size of their particles in nanometer. 1-amidoalkyl-2-naphthols were prepared via multi-component reaction of 2-naphthol, aldehydes, and amides in the presence of nano-SnCl4.SiO2 under solvent free condition at 90 °C. Short reaction times, high yields, scale up and easy work-up are the advantages of this protocol.