Nano-Fe3O4 -encapsulated silica particles bearing sulfonic acid groups as a magnetically separable catalyst for the green and efficient synthesis of 14-aryl-14H-dibenzo[a,i]xanthene-8,13-dione derivatives
作者:Mohammad Ali Ghasemzadeh、Mina Azimi-Nasrabad
DOI:10.1007/s11164-015-2073-7
日期:2016.2
efficient and environmentally friendly ("green") method for one-pot synthesis of xanthene derivatives was developed in the presence of Fe3O4@SiO2–SO3H nanoparticles. The functionalization of silica-coated Fe3O4 magnetite nanoparticles (Fe3O4@SiO2) using chlorosulfonic acid was afforded by nano-Fe3O4 encapsulated-silica particles bearing sulfonic acid (Fe3O4@SiO2–SO3H) that could be applied as a reusable
在这项研究中,开发了一种在Fe 3 O 4 @SiO 2 -SO 3 H纳米粒子存在下一锅法合成x吨衍生物的高效环保方法。带有磺酸(Fe 3 O 4 @SiO 2 –SO )的纳米Fe 3 O 4包封二氧化硅颗粒可实现使用氯磺酸对二氧化硅包覆的Fe 3 O 4磁铁矿纳米颗粒(Fe 3 O 4 @SiO 2)进行功能化。3H)可以用作可重复使用和有效的多相纳米催化剂。在回流条件下进行2-羟基-1,4-萘醌,β-萘酚和醛的多组分反应,得到一些14-芳基-14H-二苯并[a,i]]吨-8,13-二酮衍生物。该方法具有环境友好,收率高,反应时间短,纯化简单和催化剂分离简便等优点,是一种简便的方法。Fe 3 O 4 @SiO 2 –SO 3H可以使用外部磁体轻松回收,并且可以重复使用几次,而不会显着降低反应活性。通过振动样品磁力法(VSM),傅立叶变换红外(FT-IR)光谱,扫描电子显微镜(SEM)
An efficient three-component synthesis of benzoxanthenes in water
A clean, one‐pot and three‐component synthesis of new dibenzo[a,i]xanthene‐diones derivatives by cyclo‐condensation reaction of 2‐hydroxynaphthalene‐1,4‐dione, aromatic aldehydes and dimedone or 2‐naphthol in aqueous media is reported. J. Heterocyclic Chem., (2010).
Multicomponent condensation reaction of substituted aromatic aldehydes with 2-naphthol/2,7-dihydroxynaphthalene and 2-hydroxynaphthalene-1,4-dione was catalyzed by nickel oxide supported on silica ...
Polystyrene-supported GaCl3 as a highly efficient and reusable heterogeneous Lewis acid catalyst for the three-component synthesis of benzoxanthene derivatives
作者:Ali Rahmatpour
DOI:10.1007/s00706-013-0931-9
日期:2013.8
procedure utilizing polystyrene-supported gallium trichloride as a highlyactive and eco-friendly heterogeneous Lewis acid catalyst. This reaction was also extended to the preparation of 14-aryl-2-hydroxy-13H-dibenzo[a,i]xanthene-8,13(14H)-diones. The experimental and work-up procedure is very simple and the catalyst can be easily separated from the reaction mixture and reused several times in subsequent