INTRODUCING AN EFFECTIVE NANOCATALYTIC FOR THE ONE-POT SYNTHESIS AND INVESTIGATION OF BIOLOGICAL PROPERTIES OF PYRANOPYRIMIDINONE AND XANTHENE DERIVATIVES
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
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.
Abstract A green synthetic route to the facile one-pot multicomponentsynthesis of pyrano[2,3‐d]pyrimidines and pyrido[2,3‐d]pyrimidines have been developed using magnetized deionized water (MDW) as a green solvent under catalyst-free conditions. All reactions carried out in a short period of time and the products are obtained in high-to-excellent yields. The developed synthetic technique offers numerous
摘要 在无催化剂的情况下,使用磁化去离子水(MDW)作为绿色溶剂,已经开发出一条绿色的合成路线,可以轻松实现一锅多位合成吡喃并[2,3- d ]嘧啶和吡啶并[2,3- d ]嘧啶。情况。所有反应都在短时间内进行,并且以高至优异的产率获得了产物。与传统的合成方法相比,发达的合成技术具有许多优点,包括环保,清洁合成,简单,成本低,反应时间短,反应产率高以及后处理容易。此外,通过监测普通去离子水和MDW中反应混合物的吸收光谱的变化,通过分光光度法跟踪反应速率。 图形摘要
1,8-Diazabicyclo[5.4.0]undec-7-ene: A Highly Efficient Catalyst for One-Pot Synthesis of Substituted Tetrahydro-4<i>H</i>-chromenes, Tetrahydro[<i>b</i>]pyrans, Pyrano[<i>d</i>]pyrimidines, and 4<i>H</i>-Pyrans in Aqueous Medium
作者:Jitender M. Khurana、Bhaskara Nand、Pooja Saluja
DOI:10.1002/jhet.1507
日期:2014.5
We have reported 1,8‐diazabicyclo[5.4.0]undec‐7‐ene catalyzed one‐pot synthesis of tetrahydro‐4H‐chromenes, tetrahydro[b]pyrans, pyrano[d]pyrimidines and 4H‐pyrans from aldehydes, active methylene compounds malononitrile/ethyl cyanocacetate and activated C–H acids such as dimedone, 1,3‐cyclohexanedione, 1,3‐cyclopentanedione, 1,3‐dimethylbarbituric acid, and ethyl acetoacetate in water under reflux
Abstract A high-yield protocol is explored for the synthesis of pyrano[2,3-d]pyrimidines through the multi-component reaction of aromatic aldehydes, 1,3-Dimethylbarbituric acid, and malononitrile using nano-basic silica as an efficient catalyst. The method tolerates various electron-donating and electron-withdrawing groups on the aromatic ring. Nano-basic silica was characterized by field emission scanning