@article{Tayebi_Niknam_2024, title={Synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) via multi-component reactions by using silica-bonded sulfamic acid derivatives}, volume={2}, url={https://oiccpress.com/iranian-journal-of-catalysis/article/synthesis-of-44%e2%80%b2-arylmethylenebis1h-pyrazol-5-ols-via-multi-component-reactions-by-using-silica-bonded-sulfamic-acid-derivatives/}, abstractNote={The one-pot, multi-component synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) by tandem Knoevenagel-Michael reaction of phenylhydrazine, ethyl acetoacetate and aldehydes in the presence of silica-bonded N-propylpiperazine sulfamic acid (SBPPSA) as a recyclable solid acid catalyst was reported. SBPPSA showed much the same efficiency when used in consecutive reaction runs.}, number={2}, journal={Iranian Journal of Catalysis}, publisher={OICC Press}, author={Tayebi, Shekoofeh and Niknam, Khodabakhsh}, year={2024}, month={Feb.}, keywords={Catalyst, Aldehydes, Silica-bonded N-propylpiperazine sulfamic acid, 4, 4′-(Arylmethylene)bis(1H-pyrazol-5-ols). Multi-component reactions} }