Efficient one-pot synthesis of pyrazoles catalyzed by nano-crystalline solid acid catalyst
الموضوعات : Iranian Journal of CatalysisAbbas Teimouri 1 , Alireza Najafi Chermahini 2 , Leila Ghorbanian 3
1 - Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran
2 - Department of Chemistry, Isfahan University of Technology, Isfahan, 841543111, Iran.
3 - Materials Engineering Department, Isfahan University of Technology, Isfahan, Iran.
الکلمات المفتاحية: Nano-sulfated zirconia, nano ZnO, Nano--alumina, Nano-ZSM-5, Green synthesis, Pyrazoles,
ملخص المقالة :
An efficient and green protocol for the synthesis of pyrazoles derivatives by one-pot reaction of different 1,3-dicarbonyl compounds with hydrazines/hydrazides has been developed using nano-sulfated zirconia, nano-structured ZnO, nano-g-alumina and nano-ZSM-5 zeolites, as the catalyst. The optical properties of the nano-structured catalysts and organic molecules were studied. The advantages of methods are short reaction times and milder conditions, easy work-up and purification of products by non-chromatographic methods. The catalysts can be recovered for subsequent reactions and reused without any appreciable loss of efficiency.
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