H3PMo12O40 immobilized chitosan/Fe3O4 as a novel efficient, green and recyclable nanocatalyst in the synthesis of pyrano-pyrazole derivatives
作者:Ali Ayati、Majid M. Heravi、Mansoureh Daraie、Bahareh Tanhaei、Fatemeh F. Bamoharram、Mika Sillanpaa
DOI:10.1007/s13738-016-0949-0
日期:2016.12
A novel nanomagnetic composite heteropolyacid immobilized chitosan/Fe3O4 was prepared via a facile one-pot synthetic approach. This magnetically recoverable nanocatalyst, H3PMo12O40/chitosan/Fe3O4 (PMo/chit/Fe3O4), was fully characterized by XRD, FTIR, SEM and EDX analysis methods. A rapid, efficient and the chemoselective synthesis of different pyrano-pyrazole derivatives was achieved in excellent
通过一种简便的一锅合成方法制备了一种新型的纳米磁性复合杂多酸固定化壳聚糖/ Fe 3 O 4。通过XRD,FTIR,SEM和EDX分析方法对这种磁性可回收的纳米催化剂H 3 PMo 12 O 40 /壳聚糖/ Fe 3 O 4(PMo / chit / Fe 3 O 4)进行了全面表征。在催化量的PMo / Chit / Fe 3 O 4存在下,通过一锅四组分反应,可以快速,高效且化学选择性地合成不同的吡喃并吡唑衍生物。