Application of Fe3O4@SiO2@sulfamic acid magnetic nanoparticles as recyclable heterogeneous catalyst for the synthesis of imine and pyrazole derivatives in aqueous medium
作者:B. Zakerinasab、M. A. Nasseri、H. Hassani、M. M. Samieadel
DOI:10.1007/s11164-015-2204-1
日期:2016.4
Sulfamic acid supported on Fe3O4@SiO2 superpara magnetic nanoparticles was successfully applied as a recyclable solid acid catalyst with a large density of sulfamic acid groups for the synthesis of pyrazole derivatives, an important class of potentially bioactive compounds. The products are obtained in high yield from the one-pot reaction procedure involving dicarbonyl compounds and hydrazines/hydrazides. This new method totally avoids the use of toxic or expensive solvents and organic acids in this reaction.
PEG–SO3H as a mild, efficient and green catalytic system for the synthesis of pyrazole derivatives in aqueous medium
作者:M. A. Nasseri、S. A. Alavi、B. Zakeri Nasab
DOI:10.1007/s13738-012-0143-y
日期:2013.4
A versatile, alternative and environmentally benign strategy for the synthesis of a series of pyrazoles has been successfully performed in water using PEG–SO3H as an acidic catalyst. The products are obtained in high yield from the one-pot reaction procedure involving dicarbonyl compounds and hydrazines/hydrazides. This new method totally avoids the use of organic acids and toxic or expensive solvents in this reaction. The catalyst is waste-free, easily prepared, and efficiently re-used.
Synthesis of 1,3,5-Trisubstituted Pyrazoles and Hydrazones Using
Fe3O4@CeO2
Nanocomposite as an Efficient Heterogeneous Nanocatalyst
作者:H. Hassani、Z. Jahani
DOI:10.1134/s1070428020030185
日期:2020.3
Pyrazoles and hydrazones, as two significant kinds of potentially bioactive compounds, were produced with good to excellent yields by condensation of beta-dicarbonyl compounds with hydrazines in aqueous media in the presence of Fe3O4@CeO2 nanocomposite as an efficient heterogeneous nanocatalyst. The magnetic nanocatalyst can readily be separated using an external magnet and reused at least six times without significant loss in activity. The products were characterized by IR and H-1 and(13)C NMR spectra.
Yusupov, V. G.; Nasirdinov, S. D.; Yakimovich, S. I., Journal of general chemistry of the USSR, 1980, vol. 50, # 11, p. 2062 - 2066
作者:Yusupov, V. G.、Nasirdinov, S. D.、Yakimovich, S. I.、Parpiev, N. A.