Recyclable CuS quantum dots as heterogeneous catalyst for Biginelli reaction under solvent free conditions

被引：65
作者：
Chaudhary, Ganga Ram [1 ]
Bansal, Pratibha
Mehta, S. K.
机构：
[1] Panjab Univ, Dept Chem, Chandigarh 160014, India
来源：
CHEMICAL ENGINEERING JOURNAL | 2014年 / 243卷
关键词：
CuS quantum dots; Heterogeneous catalyst; Biginelli reaction; Dihydropyrimidinone; ONE-POT SYNTHESIS; CONTROLLABLE SYNTHESIS; REUSABLE CATALYST; IONIC LIQUIDS; NANOPARTICLES; MICROWAVE; EFFICIENT; PROTOCOL; DIHYDROPYRIMIDINONES; HYDROGENATION;
D O I：
10.1016/j.cej.2014.01.012
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
CuS Quantum dots (QDs) of 2-3 nm size have been synthesized in very high yield in 2 min using microwave and water as medium. The obtained QDs have been characterized by UV-visible spectrophotometer, XRD, TEM and SAED. CuS QDs have been used as a nanocatalyst to carry out Biginelli reaction in solvent free conditions. CuS QDs exhibit good catalytic activity for synthesis of dihydropyrimidinones with excellent yield. The catalyst takes less time as compared to other catalysts. It has attractive features like reduced reaction time, higher yields, ease of product isolation, economic availability of catalyst, simple procedure, and no harmful byproduct. The spent heterogeneous catalyst have been recovered by simple filtration and reused for multiple cycles. Kinetic studies have been carried out for the synthesis of both CuS QDs as well as Biginelli reaction products and rate constants have also been estimated. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：217 / 224
页数：8
相关论文
共 56 条
[1]   TaBr5-catalyzed Biginelli reaction:: one-pot synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones under solvent-free conditions [J].
Ahmed, Naseem ;
van Lier, Johan E. .
TETRAHEDRON LETTERS, 2007, 48 (31) :5407-5409
[2]   A microwave-assisted synthesis of 3,4-dihydro-pyrimidin-2-(1H)-ones catalyzed by FeCl3-supported Nanopore Silica under solvent-free conditions [J].
Ahn, Byoung Joon ;
Gang, Myoung Soo ;
Chae, Keumhee ;
Oh, Yunghee ;
Shin, Jihye ;
Chang, Wonghil .
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2008, 14 (03) :401-405
[3]   KA1(SO4)2•12H2O supported on silica gel as a novel heterogeneous system catalyzed biginelli reaction -: One-pot synthesis of di-hydropyrimidinones under solvent-free conditions [J].
Azizian, J ;
Mohammadi, AA ;
Karimi, AR ;
Mohammadizadeh, MR .
APPLIED CATALYSIS A-GENERAL, 2006, 300 (01) :85-88
[4]   New protocol for Biginelli reaction-a practical synthesis of Monastrol [J].
Bose, DS ;
Sudharshan, M ;
Chavhan, SW .
ARKIVOC, 2005, :228-236
[5]   HBF4-catalyzed Biginelli reaction: One-pot synthesis of dihydropyrimidin-2(1H)-ones under solvent-free conditions [J].
Chen, WeiYi ;
Qin, SuDong ;
Jin, JianRong .
CATALYSIS COMMUNICATIONS, 2007, 8 (02) :123-126
[6]   Calcium fluoride: an efficient and reusable catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and their corresponding 2(1H)thione: an improved high yielding protocol for the Biginelli reaction [J].
Chitra, S. ;
Pandiarajan, K. .
TETRAHEDRON LETTERS, 2009, 50 (19) :2222-2224
[7]   Using Hydrophilic Ionic Liquid, [bmim]BF4 - Ethylene Glycol System as a Novel Media for the Rapid Synthesis of Copper Nanoparticles [J].
Dewan, Manika ;
Kumar, Ajeet ;
Saxena, Amit ;
De, Arnab ;
Mozumdar, Subho .
PLOS ONE, 2012, 7 (01)
[8]  
Folkers K., 1933, J AM CHEM SOC, V55, P3784, DOI DOI 10.1021/JA01336A054
[9]   Indium(III) bromide-catalyzed preparation of dihydropyrimidinones: improved protocol conditions for the Biginelli reaction [J].
Fu, NY ;
Yuan, YF ;
Cao, Z ;
Wang, SW ;
Wang, JT ;
Peppe, C .
TETRAHEDRON, 2002, 58 (24) :4801-4807
[10]   One-Pot Synthesis of Uniform Cu2O and CuS Hollow Spheres and Their Optical Limiting Properties [J].
Gao, Jining ;
Li, Quanshui ;
Zhao, Huabo ;
Li, Lianshan ;
Liu, Chunling ;
Gong, Qihuang ;
Qi, Limin .
CHEMISTRY OF MATERIALS, 2008, 20 (19) :6263-6269
123456