Magnetic nanoparticles-supported tungstosilicic acid: as an efficient magnetically separable solid acid for the synthesis of benzoazoles in water

被引：21

作者：

Khalafi-Nezhad, Ali ^{[1
]}

Panahi, Farhad ^{[1
]}

Yousefi, Reza ^{[2
]}

Sarrafi, Sina ^{[1
]}

Gholamalipour, Yasaman ^{[1
]}

机构：

[1] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 71454, Iran

[2] Shiraz Univ, Dept Biol, Coll Sci, PCL, Shiraz 71454, Iran

来源：

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY | 2014年 / 11卷 / 05期

基金：

美国国家科学基金会;

关键词：

Magnetic nanoparticles; Heteropoly acids; Tungstosilicic acid; Benzoazoles; Water; ONE-POT SYNTHESIS; SOLVENT-FREE SYNTHESIS; HETEROPOLY ACIDS; 2-SUBSTITUTED BENZOXAZOLES; REUSABLE CATALYST; HECK REACTION; BENZIMIDAZOLES; BENZOTHIAZOLES; SILICA; PALLADIUM;

D O I：

10.1007/s13738-013-0400-8

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The magnetic nanoparticles-supported tungstosilicic acid (TSAMNP) was found to be a highly efficient solid acid for the synthesis of benzoazoles in water. TSAMNP catalyst was achieved by the immobilization of tungstosilicic acid [H-4(W12SiO40)] species on the silica core-shell magnetic nanoparticles (Fe3O4@SiO2). A variety of aldehydes were successfully condensed with 1,2-diaminobenzene, 2-aminophenol and 2-aminothiophenol in water as a green solvent to synthesize benzoazoles in good-to-excellent yields. TSAMNP catalyst was easily separated from the reaction mixture and reused several times without any loss of efficiency.

引用

页码：1311 / 1319

页数：9

共 59 条

[1] Benzoxazole and benzimidazole heterocycle-grafted graphene for high-performance supercapacitor electrodes [J].