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Title
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Preparation and characterization of the novel, green and heterogeneous catalyst namely nanomagnetic piperidinium benzene-1,3-disulfonate ionic liquid (NMIL) and its use in the synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and 1H-pyrazolo[1,2-a]pyridazine-5,8-diones under solvent-free conditions �
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Type
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JournalPaper
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Keywords
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Magnetic nanoparticles ionic liquid (NMIL): piperidinium benzene-1,3-disulfonate, 1H-pyrazolo[1,2-b]phthalazine-5,10-dione, 1H-pyrazolo[1,2-a]pyridazine-5,8-diones, Solvent-free conditions.
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Abstract
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: One-pot four-component synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and 1H-pyrazolo[1,2-a]pyridazine-5,8-diones from the reaction between various aldehydes, malononitrile, hydrazine hydrate and phthalic anhydride or maleic anhydride at 110 °C in solvent-free conditions by magnetic nanoparticles ionic liquid: piperidinium benzene-1,3-disulfonate as a novel and reusable catalyst. Some advantages of the presented procedure are a significant reduction in cost, effective catalysis and reusability of the catalyst. NMIL was thoroughly detected by FT-IR, X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermal gravimetric (TG), derivative thermal gravimetric (DTG), Brunauer, Emmett and Teller (BET), vibrating sample magnetometer (VSM) and energy-dispersive X-ray spectroscopy (EDX) analysis. This technique is developed as a suitable and safe method for the synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and 1H-pyrazolo[1,2-a]pyridazine-5,8-diones make use of an efficient and reusable green catalyst.
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Researchers
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(Third Researcher), (Second Researcher), Ramin Ghorbani-Vaghei (First Researcher)
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