Fe3O4-supported N-pyridin-4-amine-grafted graphene oxide as efficient and magnetically separable novel nanocatalyst for green synthesis of 4H-chromenes and dihydropyrano[2,3-c]pyrazole derivatives in water

被引：36

作者：

Azarifar, Davood ^{[1
]}

Khaleghi-Abbasabadi, Masoud ^{[1
]}

机构：

[1] Bu Ali Sina Univ, Dept Chem, Hamadan 65178, Iran

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 2019年 / 45卷 / 02期

关键词：

Magnetite-supported; N-pyridin-4-amine-grafted; Graphene oxide; Magnetic nanocatalyst; Dihydropyrano[2; 3-c]pyrazoles; Tetrahydrobenzo[b]pyrans; ONE-POT SYNTHESIS; RECYCLABLE CATALYST; METAL-FREE; KNOEVENAGEL CONDENSATION; MULTICOMPONENT SYNTHESIS; HETEROCYCLIC-COMPOUNDS; PROMOTED SYNTHESIS; HIGHLY EFFICIENT; FACILE CATALYST; IONIC LIQUIDS;

D O I：

10.1007/s11164-018-3597-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fe3O4-magnetized N-pyridin-4-amine-functionalized graphene oxide [Fe3O4@GO-N-(pyridin-4-amine)] was readily prepared via a three-step procedure. The synthesized nanofilms were characterized by scanning electron microscopy, powder X-ray diffraction analysis, Fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, vibrating-sample magnetometry, and elemental analysis. The prepared magnetic amine-functionalized graphene oxide exhibited high catalytic activity for one-pot three-component synthesis of dihydropyrano[2,3-c]pyrazole and tetrahydrobenzo[b]pyran (4H-chromene) derivatives. Excellent product yield, short reaction time, use of water as green solvent, and easy workup procedure are the main advantages of the present protocol. In addition, the catalyst could be easily separated by magnetic decantation and reused for six cycles without significant loss of catalytic activity. [GRAPHICS] .

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页码：199 / 222

页数：24

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