Synthesis, characterization and application of ZnFe<sub>2</sub>O<sub>4</sub>nanoparticles as a heterogeneous ditopic catalyst for the synthesis of pyrano[2,3-d] pyrimidines
In the present work, ZnFe2O4nanopowder, as a highly efficient and heterogeneous catalyst, was prepared and fully characterized by IR, UV, XRD, EDX and SEM analysis.
Nickel Nanoparticles as Semiheterogeneous Catalyst for One-Pot, Three-Component Synthesis of 2-Amino-4<i>H</i>-pyrans and Pyran Annulated Heterocyclic Moieties
作者:Jitender M. Khurana、Kanika Vij
DOI:10.1080/00397911.2012.700474
日期:2013.9.2
An efficient route for the synthesis of 2-amino-4H-pyrans and pyran annulated heterocyclic moieties has been reported via one-pot tandem Knoevenagel-cyclocondensation of aldehydes, malononitrile, and carbocyclic/heterocyclic 1,3-diones in the presence of stabilized nickel nanoparticles in ethylene glycol at room temperature. A wide range of aromatic aldehydes undergo the condensation readily to afford the pharmacologically important compounds in excellent yields. Bis-pyranization has been observed in the reactions of terephthaldehyde. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
The first urea-based ionic liquid-stabilized magnetic nanoparticles: an efficient catalyst for the synthesis of bis(indolyl)methanes and pyrano[2,3-<i>d</i>]pyrimidinone derivatives
作者:Mohammad Ali Zolfigol、Roya Ayazi-Nasrabadi、Saeed Baghery
DOI:10.1002/aoc.3428
日期:2016.5
of bis(indolyl)methane derivatives via the condensation reaction between 2‐methylindole and aldehydes at room temperature under solvent‐free conditions. Also, pyrano[2,3‐d]pyrimidinone derivatives were prepared in the presence of the nanomagnetic urea‐based catalyst by the one‐pot three‐component condensation reaction of 1,3‐dimethylbarbituric acid, aldehydes and malononitrile under solvent‐free conditions
基于尿素的离子液体稳定在二氧化硅包覆的Fe 3 O 4磁性纳米颗粒上,Fe 3 O 4 @SiO 2 @(CH 2)3-尿素-SO 3H / HCl}是碱土中一种无与伦比的,平滑释放的尿素肥料,并通过傅立叶变换红外光谱,可见光和能量分散的X射线光谱,X射线衍射,扫描和透射电子显微镜,原子能对其进行了全面表征。力显微镜和热重分析。纳米结构催化剂是一种新型,绿色,高效的催化剂,它通过2-甲基吲哚与醛在室温下在无溶剂条件下的缩合反应用于合成双(吲哚基)甲烷衍生物。另外,吡喃并[2,3- d] pyrimidinone衍生物是在纳米磁性脲基催化剂存在下,在60°C无溶剂条件下,通过1,3-二甲基巴比妥酸,醛和丙二腈的单锅三组分缩合反应制备的。据我们所知,这是首次合成在二氧化硅包覆的Fe 3 O 4磁性纳米粒子上稳定的脲基离子液体的报告。因此,当前的工作可以在合理设计,合成和应用特定任务的基于肥料