Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst for the synthesis of oxindoles

نویسندگان

  • Hossein Shahbazi-Alavi Young Researchers and Elite Club, Kashan Branch, Islamic Azad University, Kashan, Iran, E-mail addresses: [email protected] Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Iran
  • Javad Safaei-Ghomi Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Iran
چکیده مقاله:

Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as an efficientheterogeneous solid acid catalyst has been used for the preparation of spiro[pyrazoloquinoline-oxindoles]and spiro[chromenopyrazolo-oxindoles] through a four-component reactions of phenylhydrazineor hydrazine hydrate, isatins, ketoesters and naphthylamine or 2-naphthol under reflux conditions inethanol. The remarkable advantages of this methodology are easy work-up, short reaction times, highto excellent product yields, operational simplicity, low catalyst loading and reusability of the catalyst.

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عنوان ژورنال

دوره 6  شماره 3

صفحات  185- 192

تاریخ انتشار 2019-09-01

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