Author(s): Leila Zamani, Kamiar Zomorodian, Bi Bi Fatemeh Mirjalili , Soghra Khabnadideh
Nano-TiCl4·SiO2 has been introduced to be an extremely efficient catalyst for the preparation of 1-amidoalkyl-2-naphthols from various aldehydes and amides under mild conditions. We synthesized this solid Lewis acid catalyst by the reaction of nano-SiO2 and TiCl4. The processor was simple and environmentally benign with high to excellent yields. Our method has the advantages of high yields, simple methodology, and easy work-up. We studied the different properties of the catalyst by FT-IR (ATR), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and thermal gravimetric analysis (TGA). It was stable at high temperature and also it was reusable for at least three times. The antimicrobial and antifungal activities of some of the synthetic compounds were determined by broth microdilution methods as recommended by Clinical Laboratory Standard Institute. Further studies still needed to investigate the other biological activities of the compounds.