![Synthesis and application of CoFe₂O₄@THAM@PHG-SO₃H nanoparticles as a new and highly recyclable nanocatalyst in the one-pot multicomponent synthesis of 3,4-dihydropyranochromenes and chromeno[3,4-b]quinoline-6-ones](https://onlinelibrary.wiley.com/cms/asset/9b67b0f8-85a3-43d4-ba64-5cd4c7cc87d5/aoc7372-toc-0001-m.png)
The authors of this study have developed a new environmentally-friendly magnetic nanocatalyst by treating CoFe₂O₄ magnetic nanoparticles with chlorosulfonic acid, tris(hydroxymethyl)aminomethane (THAM), 1,2-dichloroethane, and phloroglucinol (PHG). They confirmed the synthesis of the catalyst using various techniques such as FT-IR, SEM, MAP, EDS, XRD, TGA, DTA, and VSM. The researchers then evaluated the catalytic efficiency of the nanocatalyst in two reactions: the synthesis of 3,4-dihydropyranochromenes and the synthesis of chromeno[3,4-b]quinoline-6-ones.
In this study, we have developed a new environmentally-friendly magnetic nanocatalyst by treating CoFe₂O₄ magnetic nanoparticles with chlorosulfonic acid, tris(hydroxymethyl)aminomethane (THAM), 1,2-dichloroethane, and phloroglucinol (PHG). They confirmed the synthesis of the catalyst using various techniques such as FT-IR, SEM, MAP, EDS, XRD, TGA, DTA, and VSM. The researchers then evaluated the catalytic efficiency of the nanocatalyst in two reactions: the synthesis of 3,4-dihydropyranochromenes from the reaction among aromatic aldehydes, 4-hydroxycoumarin, and malononitrile, and the synthesis of chromeno[3,4-b]quinoline-6-ones from the reaction among aniline, 4-hydroxycoumarin, and aromatic aldehydes.