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Shahbazi-Alavi, H., Safaei-Ghomi, J. (2019). Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst for the synthesis of oxindoles. Journal of Nanoanalysis, 6(3), 185-192. doi: 10.22034/jna.2019.668029
Hossein Shahbazi-Alavi; Javad Safaei-Ghomi. "Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst for the synthesis of oxindoles". Journal of Nanoanalysis, 6, 3, 2019, 185-192. doi: 10.22034/jna.2019.668029
Shahbazi-Alavi, H., Safaei-Ghomi, J. (2019). 'Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst for the synthesis of oxindoles', Journal of Nanoanalysis, 6(3), pp. 185-192. doi: 10.22034/jna.2019.668029
Shahbazi-Alavi, H., Safaei-Ghomi, J. Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst for the synthesis of oxindoles. Journal of Nanoanalysis, 2019; 6(3): 185-192. doi: 10.22034/jna.2019.668029

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

Article 5, Volume 6, Issue 3, Summer 2019, Page 185-192  XML PDF (733.16 K)
Document Type: Original Research Paper
DOI: 10.22034/jna.2019.668029
Authors
Hossein Shahbazi-Alavi email 1; Javad Safaei-Ghomi2
1Young Researchers and Elite Club, Kashan Branch, Islamic Azad University, Kashan, Iran, E-mail addresses: hossien_shahbazi@yahoo.com Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Iran
2Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Iran
Abstract
Cross-linked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as an efficient
heterogeneous solid acid catalyst has been used for the preparation of spiro[pyrazoloquinoline-oxindoles]
and spiro[chromenopyrazolo-oxindoles] through a four-component reactions of phenylhydrazine
or hydrazine hydrate, isatins, ketoesters and naphthylamine or 2-naphthol under reflux conditions in
ethanol. The remarkable advantages of this methodology are easy work-up, short reaction times, high
to excellent product yields, operational simplicity, low catalyst loading and reusability of the catalyst.
Keywords
Isatin; Nanocatalyst; Nano-Fe3O4, Oxindoles; Polyacrylamide
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