Copper supported on acid-activated vermiculite as an efficient and recyclable catalyst for the Biginelli reaction: a green approach

被引：6
作者：
Torres-Mendez, C. E. [1 ]
Lopez-Mayorga, B. [1 ]
机构：
[1] Univ San Carlos, Escuela Quim, 11 Av Ciudad Guatemala, Guatemala City 01012, Guatemala
来源：
CLAY MINERALS | 2020年 / 55卷 / 04期
关键词：
vermiculite; copper complex; dihydropyrimidinones; one-pot synthesis; green chemistry; heterogeneous catalysis; ONE-POT SYNTHESIS; SOLVENT-FREE BIGINELLI; HETEROGENEOUS CATALYST; IONIC LIQUID; DIHYDROPYRIMIDINONES; 3,4-DIHYDROPYRIMIDIN-2(1H)-ONES; NANOPARTICLES; 3-COMPONENT; TEMPERATURE; CONVERSION;
D O I：
10.1180/clm.2020.37
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The synthesis of copper citrate complex supported on acid-activated vermiculite was investigated with a view to preparing an efficient, mild, robust and recyclable catalyst for the Biginelli reaction. The new catalyst was characterized by X-ray fluorescence (XRF), infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), and scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS). Copper citrate supported over activated vermiculite (AAVrm-Cu2) showed good catalytic activity in the synthesis of 3,4-dihydropyrimidinones. The catalyst can be separated easily from the reaction mixture by filtration and retains its catalytic activity for up to five cycles of reaction with no apparent decrease in yield.
引用
收藏
页码：271 / 280
页数：10
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