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 solid acid catalyst 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。