Abstract
In this study, organic–inorganic hybrid materials based on polyoxometalate and copper coordination polymer, [CuI(4,4′-bipy)]3[PMo VI10 Mo V2 O40{CuII(2,2′-bipy)}] designated as CuMo-CP(1), were prepared and characterized by various techniques including X-ray powder diffraction (XRD), infrared spectroscopy (FT-IR), and elemental analysis. It was found that the CuMo-CP(1) can be used as an efficient heterogeneous bifunctional acid-base catalyst for Knoevenagel condensation of aromatic aldehydes and cyclohexanone with malononitrile or ethyl cyanoacetate at 60 °C in ethanol. Obtaining the corresponding Knoevenagel adduct in moderate to excellent conversion yields within 4 h is promising. The catalyst can be easily recovered from the reaction mixture and reused for three times without significant loss of activity.
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The authors would appreciate the Alzahra University for financial support.
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Farzaneh, F., Kashani Maleki, M. & Ghandi, M. Multifunctional Cu(II) organic–inorganic hybrid as a catalyst for Knoevenagel condensation. Reac Kinet Mech Cat 117, 87–101 (2016). https://doi.org/10.1007/s11144-015-0919-z
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DOI: https://doi.org/10.1007/s11144-015-0919-z