@article{Yosefzadeh_Mokhtary_2024, title={Polyvinylpolypyrrolidone supported chlorosulfonic acid: An efficient catalyst for the one-pot synthesis of hexahydroquinolines}, volume={6}, url={https://oiccpress.com/iranian-journal-of-catalysis/article/polyvinylpolypyrrolidone-supported-chlorosulfonic-acid-an-efficient-catalyst-for-the-one-pot-synthesis-of-hexahydroquinolines/}, abstractNote={ABSTRACT Polyvinylpolypyrrolidone supported chlorosulfonic acid ([PVPP-SO3H]+Cl-) was synthesized and evaluated as a recoverable catalyst for the one-pot synthesis of hexahydroquinolines by reaction of arylaldehydes, dimedone (5,5-dimethylcyclohexane-1,3-dione) or 1,3-cyclohexanedione, ethylacetoacetate and ammonium acetate in high to excellent yield in ethanol at 70 °C. The [PVPP-SO3H]+Cl- catalyst was characterized via Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The capacity of the reagent was determined by titration and found to be 12 mmol/g, which shows a high loading of H+ per gram of the catalyst. Moreover, the catalyst could be recycled several times without significant loss of its catalytic activity. Clean methodologies, easy work-up procedure, high yield and simple preparation of the catalyst are some advantages of this work.}, number={2}, journal={Iranian Journal of Catalysis}, publisher={OICC Press}, author={Yosefzadeh, Mahshid and Mokhtary, Masoud}, year={2024}, month={Feb.}, keywords={Multicomponent reaction, Polyvinylpolypyrrolidone, Chlorosulfonic acid, Hexahydroquinolines} }