Caesium carbonate supported on hydroxyapatite‐encapsulated Ni0.5Zn0.5Fe2O4 nanocrystallites as a novel magnetically basic catalyst for the one‐pot synthesis of pyrazolo[1,2‐b]phthalazine‐5,10‐diones |
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| Authors: | Behrooz Maleki Samaneh Barat Nam Chalaki Samaneh Sedigh Ashrafi Esmail Rezaee Seresht Farid Moeinpour Amir Khojastehnezhad Reza Tayebee |
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| Institution: | 1. Department of Chemistry, Hakim Sabzevari University, Sabzevar, Iran;2. Department of Chemistry, College of Sciences, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran;3. Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran |
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| Abstract: | A novel nanomagnetic basic catalyst of caesium carbonate supported on hydroxyapatite‐coated Ni0.5Zn0.5Fe2O4 magnetic nanoparticles (Ni0.5Zn0.5Fe2O4@HAP‐Cs2CO3) was prepared. This new catalyst was fully characterized using Fourier transform infrared spectroscopy, transmission and scanning electron microscopy, X‐ray diffraction and vibrating sample magnetometry techniques, and then the catalytic activity of this catalyst was investigated in the synthesis of 1H‐pyrazolo1,2‐b]phthalazine‐5,10‐dione derivatives. Also, Ni0.5Zn0.5Fe2O4@HAP‐Cs2CO3 could be reused at least five times without significant loss of activity and could be recovered easily by applying an external magnet. Thus, the developed nanomagnetic catalyst is potentially useful for the green and economic production of organic compounds. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | Ni0 5Zn0 5Fe2O4 magnetic nanoparticle‐supported caesium carbonate 1H‐pyrazolo[1 2‐b]phthalazine‐5 10‐diones aldehydes malononitrile ethyl cyanoacetate phthalhydrazide green chemistry |
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