Efficient one-pot synthesis of pyrazoles catalyzed by nano-crystalline solid acid catalyst
محورهای موضوعی : Iranian Journal of Catalysis
Abbas Teimouri
1
(
Chemistry Department, Payame Noor University, 19395-4697, Tehran, Iran
)
Alireza Najafi Chermahini
2
(
Department of Chemistry, Isfahan University of Technology, Isfahan, 841543111, Iran.
)
Leila Ghorbanian
3
(
Materials Engineering Department, Isfahan University of Technology, Isfahan, Iran.
)
کلید واژه: Nano-sulfated zirconia, nano ZnO, Nano--alumina, Nano-ZSM-5, Green synthesis, Pyrazoles,
چکیده مقاله :
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.
Green Chem,Handbook of Heterocyclic Chemistry. Pergamon, New York,J. Org. Chem,Synth. Commun,Synthesis,Tetrahedron Lett,J. Organomet. Chem,Synth. Commun,Org. Lett,Pyrazoles, Pyrazolines, Pyrazolidines, Indazoles and Condensed Rings, Inter-Science, New York,Comprehensive Heterocyclic Chemistry II, vol. 3, Pergamon, Oxford,J. Indian Chem. Soc,Synthesis,Green Chem. Lett. Rev,Tetrahedron Lett,Appl. Clay Sci,Monatsh. Chem,Arkivoc,Synlett,Tetrahedron,J. Chem. Res,Synth. Commun,Catal. Commun,Mater. Lett,Tetrahedron Lett,Appl. Catal. B,Appl. Catal., A,Microporous Mesoporous Mater,Chem. Ber,Catal. Commun,J. Mol. Catal. A: Chemical
