@article{Bamoniri_Mirjalili_Nazemian_2024, title={Nano-Silica phosphoric acid: an efficient catalyst for one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (thiones) under solvent-free or sonication conditions}, volume={2}, url={https://oiccpress.com/iranian-journal-of-catalysis/article/nano-silica-phosphoric-acid-an-efficient-catalyst-for-one-pot-synthesis-of-34-dihydropyrimidin-21h-ones-thiones-under-solvent-free-or-sonication-conditions/}, abstractNote={Two simple protocols for the synthesis of three-component condensation reaction of an aldehyde, β-ketoester and urea or thiourea to obtain the 3, 4-dihydropyrimidin-2(1H)-ones (thiones) using nano silica phosphoric acid are reported. Short reaction times, high yields, reusability of catalyst and easy workup are some advantages of these protocols.}, number={1}, journal={Iranian Journal of Catalysis}, publisher={OICC Press}, author={Bamoniri, Abdolhamid and Mirjalili, Bi Bi Fatemeh and Nazemian, Sedigheh}, year={2024}, month={Feb.}, keywords={Biginelli reaction, 4-Dihydropyrimidin-2(1H)-ones, 4-Dihydropyrimidin-2(1H)-thiones, Heterogeneous catalyst. Multi-component reactions, Nano silica phosphoric acid} }