%0 Journal Article %T Highly effective synthesis of 3, 4-dihydropyrimidin-2 (1H)-ones using pyridinium-N-sulfonic acid bisulfate as a dual-functional catalyst %J Asian Journal of Nanoscience and Materials %I Sami Publishing Company %Z 2645-775X %A Dehghani, Sima %A Merajoddin, Maria %A Zare, Abdolkarim %D 2019 %\ 10/01/2019 %V 2 %N 4 %P 367-375 %! Highly effective synthesis of 3, 4-dihydropyrimidin-2 (1H)-ones using pyridinium-N-sulfonic acid bisulfate as a dual-functional catalyst %K 3 %K 4-Dihydropyrimidin-2 (1H)-one Acidic ionic liquid Dual-functional catalyst Pyridinium-N-sulfonic acid bisulfate (Py-SO3H][HSO4]) Solvent-free %R 10.26655/AJNANOMAT.2019.4.1 %X Acidic ionic liquid pyridinium-N-sulfonic acid bisulfate ([Py-SO3H][HSO4]) has effectively catalyzed the production of 3, 4-dihydropyrimidin-2 (1H)-ones via the condensation reaction of the arylaldehydes with β-ketoesters and urea under solvent-free conditions. Due to the dual-functionality of [Py-SO3H][HSO4] (bearing acidic and basic sites), it was highly effective and general catalyst for the reaction. Additionally, an attractive mechanism for the dual-functionality of the catalyst was proposed. %U https://www.ajnanomat.com/article_85817_1641d84f6c76d1a423dc3a4742b9347b.pdf