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<p>In this study, one of the most unique green catalysts named Cu-Picolin-Chitosan-mTEG was designed, synthesized and analyzed using different methods such as XRD, FESEM, TEM, TGA, FTIR, EDX-EDS, DLS, and ICP analyses. After confirming of synthesized nanocomposite, it is tested in oxidation of various alcohols to aldehyde and the insitu formed aldehydes are condensed with thiourea and 4‑hydroxycumarin. Finally, the synthesis of nine new thioxochromenopyrimidine derivatives by Cu-Picolin-Chitosan-mTEG is examined in perfect yields from alcohol derivatives. The conditions for reaction are green, and water is used as a solvent. This protocol offers several notable advantages, such as cost-effectiveness, atom economy, low catalyst loading, green oxidants, mild conditions, high yields, and recyclability of the nanocomposite over five cycles. Notably, this is the first report on the use of this nanocomposite for the synthesis of thioxochromenopyrimidine derivatives.</p>

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Eco-friendly Biginelli reaction via copper–chitosan catalyst

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Magda H. Abdellattif,
  • Chou-Yi Hsu,
  • Munthar Kadhim Abosaoda,
  • Ashok Kumar Bishoyi,
  • Suhas Ballal,
  • Manal Morad Karim,
  • Abhayveer Singh,
  • S. Supriya,
  • Rajashree Panigrahi

摘要

In this study, one of the most unique green catalysts named Cu-Picolin-Chitosan-mTEG was designed, synthesized and analyzed using different methods such as XRD, FESEM, TEM, TGA, FTIR, EDX-EDS, DLS, and ICP analyses. After confirming of synthesized nanocomposite, it is tested in oxidation of various alcohols to aldehyde and the insitu formed aldehydes are condensed with thiourea and 4‑hydroxycumarin. Finally, the synthesis of nine new thioxochromenopyrimidine derivatives by Cu-Picolin-Chitosan-mTEG is examined in perfect yields from alcohol derivatives. The conditions for reaction are green, and water is used as a solvent. This protocol offers several notable advantages, such as cost-effectiveness, atom economy, low catalyst loading, green oxidants, mild conditions, high yields, and recyclability of the nanocomposite over five cycles. Notably, this is the first report on the use of this nanocomposite for the synthesis of thioxochromenopyrimidine derivatives.