OICC Press Iranian Journal of Catalysis 2345-4865 1 2 2024 02 03 Nano-BF3.SiO2: A reusable and eco-friendly catalyst for thioacetalization and trans-thioacetalization reactions EN Bi Bi Fatemeh Mirjalili Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran 0000-0002-6588-4041 Abdolhamid Bamoniri Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran 0000-0002-8911-2433 Ali Akbari Department of Organic Chemistry and Natural Products, Chemistry and Chemical Engineering Research Center of Iran, 17th Km, Pajoohesh Blvrd., Tehran-Karaj Highway, Tehran, Iran. Journal Article 2024 02 03 Nano-silica supported boron trifluoride (BF3.SiO2) is an efficient, reusable and eco-friendly catalyst for chemoselective thioacetalization of aldehydes and ketones. So, this catalyst was applied for transthioacetalization of acetals and acylals into their corresponding 1,3-dithiolanes or 1,3-dithianes  in good to excellent yields. The reactions were carried out at room temperature under solvent free and grinding conditions in 1.5-2.5 minutes.