Polyphosphoric acid supported on Ni0.5Zn0.5Fe2O4 nanoparticles as a magnetically-recoverable green catalyst for the synthesis of pyranopyrazoles

被引：36
|
作者：
Moeinpour, Farid [1 ]
Khojastehnezhad, Amir [2 ]
机构：
[1] Islamic Azad Univ, Dept Chem, Coll Sci, Bandar Abbas Branch, Tehran 7915893144, Iran
[2] Islamic Azad Univ, Mashhad Branch, Dept Chem, Mashhad, Iran
来源：
ARABIAN JOURNAL OF CHEMISTRY | 2017年 / 10卷
关键词：
Polyphosphoric acid; Catalysis; Pyranopyrazoles; Magnetic nanoparticles; SOLVENT-FREE CONDITIONS; MULTICOMPONENT SYNTHESIS; EFFICIENT SYNTHESIS; DERIVATIVES; PPA-SIO2; NITRILES;
D O I：
10.1016/j.arabjc.2014.02.009
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Polyphosphoric acid supported on silica coated Ni0.5Zn0.5Fe2O4 nanoparticles was found to be magnetically separable, highly efficient, eco-friendly, green and recyclable heterogeneous catalyst. This new catalyst at first was fully characterized by TEM, SEM, FTIR and XRD techniques and then catalytic activity of this catalyst was investigated in the synthesis of 5-cyano-1,4-dihydropyrano[2,3-c] pyrazoles. Also the Ni0.5Zn0.5Fe2O4 magnetic nanoparticle-supported polyphosphoric acid could be reused at least six times without significant loss of activity. It could be recovered easily by applying an external magnet. (C) 2014 King Saud University. Production and hosting by Elsevier B.V.
引用
收藏
页码：S3468 / S3474
页数：7
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