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Alireza Karimi

Alireza Karimi

Academic rank: Professor
ORCID: https://orcid.org/0000-0001-5006-8642
Education: PhD.
ScopusId: 57217189368
Faculty: Science
Address: Arak University
Phone:

Research

Title
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
Type
JournalPaper
Keywords
Magnetic nanoparticles  Mono- and bis-spiro-2-amino-4H-pyrans  Ultrasound irradiation  1,3-Dicarbonyl compounds
Year
2015
Journal Research on Chemical Intermediates
DOI
Researchers Alireza Karimi ، Zeinab Dalirnasab ، Reyhaneh Davood Abadi

Abstract

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.