compounds containing at least one core moiety of pyrano[2,3-d]pyrimidine have received considerable attention in synthetic organic chemistry because of their potential as drugs and bioactive compounds. Pyrano[2,3-d]pyrimidines have attracted interest in medicine as antitumor, anti-hypertensive, antibacterial and antileishmanial drugs. Pyrano[2,3-d]pyrimidines have been produced by a number of methods. A
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
Solvent-free multicomponent assembling of aldehydes, <i>N,N</i>′-dialkyl barbiturates and malononitrile: fast and efficient approach to pyrano[2,3-<i>d</i>]pyrimidines
作者:Michail N. Elinson、Fedor V. Ryzhkov、Valentina M. Merkulova、Alexey I. Ilovaisky、Gennady I. Nikishin
DOI:10.1515/hc-2014-0114
日期:2014.10.1
Abstract
Potassium fluoride-catalyzed solvent-free multicomponent reaction of aldehydes, N,N′-dialkyl barbiturates and malononitrile results in the fast (15 min) and efficient (yields 89–95%) formation of substituted pyrano[2,3-d]pyrimidines. The improved synthetic methodology for this class of bioactive compounds is important from the viewpoint of diversity-oriented large-scale processes and represents an environmentally benign solvent-free synthetic concept for multicomponent reactions strategy.