DABCO-modified magnetic core-shell as an efficient nanocatalyst for synthesizing polyhydroquinoline derivatives DOI Creative Commons

Mozhgan Esfandiari,

Alireza Salimi Beni

Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 13

Published: March 31, 2025

The fabrication of core-shell structured magnetic resorcinol-formaldehyde composites has garnered considerable attention within the scientific community in recent years. A key area focus been immobilization homogeneous catalysts onto surfaces these materials and transforming them into heterogeneous catalysts. In this study, a novel quaternary ammonium salt catalyst was synthesized by immobilizing 1,4-diazabicyclo [2.2.2] octane (DABCO) on resorcinol-formaldehyde-modified Fe 3 O 4 nanocomposite as support (Fe @RF/Pr-DABCO). @RF/Pr-DABCO characterized using various physicochemical techniques, including FT-IR, VSM, SEM, XRD, TGA. employed power nanocatalyst Hantzsch reaction for synthesizing polyhydroquinoline derivatives aromatic aldehydes, acetate, dimedone ethyl acetoacetate. Various aldehydes were used substrates presence 0.003 g under solvent-free condution at 60 °C, achieving high to excellent yields (90-99%) short times (5-15 min). Furthermore, showed reusability maintained its catalytic activity least eight consecutive cycles without significant decrease efficiency. These results demonstrate potential an efficient sustainable synthesis via reaction.

Language: Английский

DABCO-modified magnetic core-shell as an efficient nanocatalyst for synthesizing polyhydroquinoline derivatives DOI Creative Commons

Mozhgan Esfandiari,

Alireza Salimi Beni

Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 13

Published: March 31, 2025

The fabrication of core-shell structured magnetic resorcinol-formaldehyde composites has garnered considerable attention within the scientific community in recent years. A key area focus been immobilization homogeneous catalysts onto surfaces these materials and transforming them into heterogeneous catalysts. In this study, a novel quaternary ammonium salt catalyst was synthesized by immobilizing 1,4-diazabicyclo [2.2.2] octane (DABCO) on resorcinol-formaldehyde-modified Fe 3 O 4 nanocomposite as support (Fe @RF/Pr-DABCO). @RF/Pr-DABCO characterized using various physicochemical techniques, including FT-IR, VSM, SEM, XRD, TGA. employed power nanocatalyst Hantzsch reaction for synthesizing polyhydroquinoline derivatives aromatic aldehydes, acetate, dimedone ethyl acetoacetate. Various aldehydes were used substrates presence 0.003 g under solvent-free condution at 60 °C, achieving high to excellent yields (90-99%) short times (5-15 min). Furthermore, showed reusability maintained its catalytic activity least eight consecutive cycles without significant decrease efficiency. These results demonstrate potential an efficient sustainable synthesis via reaction.

Language: Английский

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