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<p>In this report, environmentally benign strategies were developed for one-pot multicomponent synthesis of isoxazol-5(4<i>H</i>)-one, dihydropyrano[3,2-c]chromene and dihydropyrano[2,3-c]pyrazoles in aqueous medium using an efficient, APTES immobilized copper-doped nitrogen quantum dots (CuNPs@N-GQDs@APTES) nanocatalyst. The catalytic superiority of CuNPs@N-GQDs@APTES leads to the synthesis of advanced heterocycles under optimum reaction conditions. The use of green aqueous medium, ambient reaction temperature, short reaction time, and admirable yields (80–96%) are the notable features of these strategies. The catalyst's performance was found superior with respect to time and yield compared to similar reported catalysts. Moreover, the CuNPs@N-GQDs@APTES catalyst exhibited remarkable recyclability over several reaction&#xa0;cycles&#xa0;without significant activity loss.</p> Graphical abstract <p></p>

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APTES immobilized copper-doped nitrogen quantum dots (CuNPs@N-GQDs@APTES) nanocatalyst for synthesis of isoxazol-5(4H)-one, dihydropyrano[3,2-c]chromene and dihydropyrano[2,3-c]pyrazoles in aqueous medium

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Kiran Bagade,
  • Arjun Kumbhar

摘要

In this report, environmentally benign strategies were developed for one-pot multicomponent synthesis of isoxazol-5(4H)-one, dihydropyrano[3,2-c]chromene and dihydropyrano[2,3-c]pyrazoles in aqueous medium using an efficient, APTES immobilized copper-doped nitrogen quantum dots (CuNPs@N-GQDs@APTES) nanocatalyst. The catalytic superiority of CuNPs@N-GQDs@APTES leads to the synthesis of advanced heterocycles under optimum reaction conditions. The use of green aqueous medium, ambient reaction temperature, short reaction time, and admirable yields (80–96%) are the notable features of these strategies. The catalyst's performance was found superior with respect to time and yield compared to similar reported catalysts. Moreover, the CuNPs@N-GQDs@APTES catalyst exhibited remarkable recyclability over several reaction cycles without significant activity loss.

Graphical abstract