An efficient and green one-pot synthesis of indazolo[1,2-b]-phthalazinetriones via three-component reaction of aldehydes, dimedone, and phthalhydrazide using Fe3O4@SiO2 core–shell nanoparticles
作者:Boshra Mirhosseini-Eshkevari、Mohammad Ali Ghasemzadeh、Javad Safaei-Ghomi
DOI:10.1007/s11164-014-1854-8
日期:2015.10
An efficient and eco-friendly procedure for the one-pot synthesis of biologically active heterocyclic compounds including indazolo[1,2- b ]-phthalazinetriones has been developed in the presence of Fe3O4@SiO2 nanoparticles. The multicomponent reactions of aldehydes, dimedone, and phthalhydrazide were carried out under solvent-free conditions to obtain some indazolo[1,2- b ]-phthalazinetrione derivatives
在Fe 3 O 4 @SiO 2纳米粒子的存在下,已经开发出了一种有效且环保的方法,用于一锅合成生物活性杂环化合物,包括吲哚并[1,2- b ]-酞嗪三酮。在无溶剂条件下进行醛,二甲酮和邻苯二甲酰肼的多组分反应,得到一些吲唑并[1,2- b ]-酞嗪三酮衍生物。本方法提供了许多优点,例如优异的收率,简单的后处理,低的反应时间,容易的催化剂分离和很少的催化剂负载。
Nano-silica supported acidic ionic liquid as an efficient catalyst for the multi-component synthesis of indazolophthalazine-triones and bis-indazolophthalazine-triones
A supported ionic liquid bearing sulfonic acid groups was synthesized by anchoring 3-sulfopropyl-1-(3-propyltrimethoxysilane)imidazolium hydrogen sulfate onto nano-silica and characterized by FT-IR spectroscopy, elemental analysis and scanning electron microscopy (SEM) techniques. This catalyst was used for the efficient one-pot multi-component synthesis of indazolophthalazine-triones and bis-indazolophthalazine-triones. Moreover, the catalyst could be reused at least seven times without any significant loss of activity.
of this nanocomposite for the preparation of phthalazine-trione and phthalazine-dione derivatives is surprising under reflux conditions via the one-pot three-component condensation reaction of phthalhydrazide, aromatic aldehydes, and diketones. This green catalyst is easily recovered and re-utilized for the next reaction at least four runs without having any considerable influence on the yields. This
Fe3O4@silica sulfuric acid nanoparticles: An efficient reusable nanomagnetic catalyst as potent solid acid for one-pot solvent-free synthesis of indazolo[2,1-b]phthalazine-triones and pyrazolo[1,2-b]phthalazine-diones
作者:Ali Reza Kiasat、Jamal Davarpanah
DOI:10.1016/j.molcata.2013.03.003
日期:2013.7
nanomagnetic solidacidcatalyst in the one-pot three-components condensation reaction of phthalhydrazide, aromatic aldehydes and cyclic or acyclic 1,3-diketones are also described. Utilization of easy reaction conditions, catalyst with high catalytic activity and good reusability, and simple magnetically work-up, makes this methodology as an interesting option for the economic synthesis of indazolo[2
关于绿色化学的目标,二氧化硅涂覆的磁铁矿纳米颗粒(MNP)开辟了新途径,以引入令人惊叹且高效的系统,以促进不同有机反应中催化剂的回收。因此,本文提出了使用Fe 3 O 4制备具有核-壳结构(Fe 3 O 4 @二氧化硅硫酸)的硫酸功能化二氧化硅包覆的磁铁矿纳米粒子。球体为核心,二氧化硅硫酸纳米粒子为壳。通过红外光谱(FT-IR),扫描电子显微镜(SEM),透射电子显微镜(TEM),X射线衍射(XRD)光谱和振动样品磁力计(VSM)对催化剂进行了表征。还描述了该纳米磁性固体酸催化剂在邻苯二甲酰肼,芳族醛与环状或非环状的1,3-二酮的单锅三组分缩合反应中的能力。易用的反应条件,高催化活性和良好的可重复使用性以及简单的磁性后处理使得该方法成为经济合成吲唑并[ 2,1 - b ]酞嗪-三酮和吡唑并[1,]的有趣选择。2 - b ]酞嗪二酮。
Experimental and theoretical study on one-pot, three-component route to 2H-indazolo[2,1-b]phthalazine-triones catalyzed by nano-alumina sulforic acid
Abstract A simple, efficient, and high yielding one-pot protocol for the synthesis of 2H-indazolo[2,1-b]phthalazine-trione derivatives has been developed by three-component coupling of phthalhydrazide, dimedone and some aromatic aldehydes in ecofriendly neat conditions promoted by nano-γ-alumina sulforic acid. This protocol avoids the use of expensive catalysts, toxic solvents and chromatographic separation
摘要 通过邻苯二甲酰肼、二甲酮和一些芳香醛的三组分偶联,在生态友好的纯净环境中,开发了一种简单、高效、高产的一锅法合成 2H-吲唑并 [2,1-b] 酞嗪三酮衍生物。纳米γ-氧化铝硫酸促进的条件。该协议避免使用昂贵的催化剂、有毒溶剂和色谱分离。此外,拟议的协议扩展到线性 β-二酮(乙酰丙酮)而不是环状二酮(二甲酮)。证明了这种收敛且环境友好的方法的通用性和功能耐受性。该缩合反应的建议机制的每个步骤的性质也可以通过使用 B3LYP/6-31G ** 理论水平的密度泛函理论 (DFT) 计算来确定。结果表明,第一步是电荷控制;而第二个由前沿分子轨道控制。还计算了 1 H 和 13 C 化学位移值以及标题化合物的结构参数,并将缩放值与相应的实验 NMR 和 X 射线光谱进行了比较。因此,计算的光谱数据和优化的几何形状与实验结果非常吻合。