OICC Press Iranian Journal of Catalysis 2345-4865 10 3 2024 02 03 Synthesis, characterization and using Fe3O4@SiO2@FeCl3 as a new nanocatalyst for aza-Michael reaction between amines and ethyl crotonate EN Hamid Parsa Department of Chemistry, Faculty of Science, Imam Hossein University, Tehran 16597, Iran. Mohammad Javad Taghizadeh Department of Chemistry, Faculty of Science, Imam Hossein University, Tehran 16597, Iran. Mojtaba Mossavi Department of Chemistry, Faculty of Science, Imam Hossein University, Tehran 16597, Iran. Jaber Hosseini Department of Chemistry, Faculty of Science, Imam Hossein University, Tehran 16597, Iran. Journal Article 2024 02 03 In this article, recyclable Fe3O4@SiO2@FeCl3 was synthesized and entirely characterized by various techniques including XRD, FT-IR, SEM, EDX and VSM analysis. The catalytic ability of produced Fe3O4@SiO2@FeCl3 was studied in the aza-Michael reaction of diethyl amine and ethyl crotonate which lead to high yield of product. Also, this procedure was used to synthesize other derivatives resulted from different amines. Synthesized Fe3O4@SiO2@FeCl3 nanocatalyst has some great advantages such as easy preparation method, simple recovery and high efficiency.