Iranian Journal of Catalysis (IJC) Fe3O4@SiO2@NCs@Al2O3 as a Nanocatalyst for Efficient One-pot Synthesis of Tetrahydrobenzo[b]pyran in Water Volume 14 (2024) Issue 2, June 2024 2024 05 25 Fe3O4@SiO2@NCs@Al2O3 as a Nanocatalyst for Efficient One-pot Synthesis of Tetrahydrobenzo[b]pyran in Water 10.57647/j.ijc.2024.1402.20 EN Neda Daria Department of chemistry, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran. 0009-0004-6938-8266 Koroush Ebrahimzadeh Department of Education Gilan, Dr behzad research institute, Rasht, Iran. Islamic Azad University, Sama Rasht Branch, Rasht, Iran. 0009-0006-8456-4656 Naghmeh Darya Department of chemistry, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran. 0009-0009-2364-7126 Journal Article 2024 05 25 In this research, we reported Fe3O4@SiO2@NCs@Al2O3 [FSNCA] nanoparticles as an efficient catalyst for the synthesis of Tetrahydrobenzopyrans (THBPS) in water solvent at room temperature with short reaction time. The catalyst exhibits excellent catalytic activity, selectivity, and recyclability. The nanocatalyst structure was characterized by FT-IR, SEM, XRD, TGA, VSM, and EDS. There are significant advantages of using the FSNCA nanocatalyst such as the primary benefit is the increase in production efficiency. By enabling a one-pot synthesis process, this nanocatalyst decreases the stages required for reaction, reducing time and energy consumption. Furthermore, the possibility of recycling the catalyst contributes to economic efficiency, minimizing waste production, thereby aligning with the principles of green chemistry. Highlights This research describes the catalytic activity of a nanocatalyst made of the materials available which are easily and quite prevalent in nature. The nanoparticles efficiently catalyze the synthesis of Tetrahydrobenzo[b]pyran derivatives and this method is superior in terms of the reaction temperature, green solvent and yields. No side reactions, Product’s purity and yield enhanced by Fe3O4@SiO2@NCs@Al2O3 as green magnetic catalyst. Clean separation and recyclability of the catalyst The article meet the principles of Green chemistry