OICC Press Iranian Journal of Catalysis 2345-4865 8 4 2024 02 03 Fe3O4@FSM-16-SO3H as a new magnetically recyclable nanostructured catalyst: synthesis, characterization and catalytic application for the synthesis of pyrano[2,3-c]pyrazoles EN Somayeh Hashemi-Uderji Department of Chemistry, Yazd University, Yazd 89158-13149, Iran. Mohammad Abdollahi-Alibeik Department of Chemistry, Yazd University, Yazd 89158-13149, Iran. 0000-0002-6776-3171 Reza Ranjbar-Karimi Department of Chemistry, Faculty of Science, Vali-e-Asr University, Rafsanjan 77176, Iran. Journal Article 2024 02 03 A three-component process for the one-pot synthesis of 6-amino-4-aryl-5-cyano-3-methyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles is described by the three-component reaction of aldehydes, 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one and malononitrile in the presence of Fe3O4@FSM-16-SO3H as an efficient magnetically recyclable mesoporous catalyst. Folded sheet mesoporous material (FSM-16) was prepared by intercalation of a layered, kanemite type sodium silicate with cetyltrimethylammonium (CTMA) ions in the presence of dispersed Fe3O4. The Fe3O4@FSM-16-SO3H was synthesized by sulfonation of Fe3O4@FSM-16 and characterized by FESEM, XRD, BET, VSM and FT-IR techniques. This protocol suggests benefits in terms of higher yields and short reaction time. In addition, the catalyst could be separated using an external magnet and is reusable many times without any significant loss of activity.