Efficient one-pot synthesis of pyrazoles catalyzed by nano-crystalline solid acid catalyst

Iranian Journal of Catalysis

مقاله 2، دوره 4، شماره 1، خرداد 2014، صفحه 9-15   

نویسندگان

Abbas Teimouri^{* 1}؛ Alireza Najafi Chermahini²؛ Leila Ghorbanian³

¹Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran

²Department of Chemistry, Isfahan University of Technology, Isfahan, 841543111, Iran.

³Materials Engineering Department, Isfahan University of Technology, Isfahan, Iran.

چکیده

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.

کلیدواژه‌ها

Nano-sulfated zirconia؛ nano ZnO؛ Nano--alumina؛ Nano-ZSM-5؛ Green synthesis؛ Pyrazoles

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