عنوان
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Synthesis of mono- and bis-spiro-2-amino-4H-pyrans catalyzed by S-alkyl O-hydrogen sulfothioate functionalized silica-coated magnetic nanoparticles under ultrasound irradiation
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نوع پژوهش
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مقاله چاپشده
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کلیدواژهها
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Magnetic nanoparticles Mono- and bis-spiro-2-amino-4H-pyrans Ultrasound irradiation 1,3-Dicarbonyl compounds
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چکیده
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New S-alkyl O-hydrogen sulfothioate functionalized silica-coated magnetic nanoparticles were prepared in a simple method and evaluated as an efficient catalyst in synthesis of mono- and bis-spiro-2-amino-4H-pyrans through three or pseudo-five component reaction of isatins or bis-isatins and malononitrile with dimedone or 4-hydroxycoumarin. The yields were excellent, and the catalyst could be recovered simply from the reaction mixture using an external magnet and reused at least five times without noticeable loss of catalytic activity.
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پژوهشگران
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ریحانه داوود آبادی (نفر دوم)، زینب دلیرنسب (نفر سوم)، علیرضا کریمی (نفر اول)
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