Magnetic Piperazine-Functionalized Reduced Graphene Oxide as a Heterogeneous Catalyst in the Pechmann Coumarin Synthesis
Publish place: 27th Iranian Seminar on Organic Chemistry
Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISOC27_122
تاریخ نمایه سازی: 19 اسفند 1399
Abstract:
Carbon nanomaterials have been ideal candidates for metal-free catalysts due to their inexpensiveness, easy availability, environmental friendliness and unique surface properties. Among them, the modified graphene oxide having a two-dimensional structure and prominent features has attracted a lot of attention(1). Chemical reduction of graphene oxide (rGO) is performed using hydrazine hydrate, which is also guided by the removal of oxygen and the recycling of two-way aromatic carbon and also has chemical active sites that make it noticeable as an active substance in molecular sensors (2) .Coumarins play an important role in the natural products and organic synthesis To date, there are several methods for the synthesis of coumarines have been reported in the literature .Pechmann reaction is one of the best methods which include the condensation of phenols with β-ketoesters in the presence of various catalysts (3). In this work, the piperazine-functionalized reduced graphene oxide was initially synthesized, magnetized with Fe3O4, and was then used as a heterogeneouc catalyst in the Pechmann coumarin synthesis under solvent-free conditions. Also, effects of the various reaction parameters, including temperature, reaction time, mol% catalyst were studied. The yield results showed that the above magnetic catalyst efficienty catalyzed the Pechmann reaction
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Authors
Fatemeh Tafazooli Gazkoh
Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, Iran
Esmail Rezaei Seresht
Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, Iran
Behrooz Maleki
Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar, Iran