Solvent‑free Pechmann synthesis of coumarins catalyzed by magnetic heterogeneous catalyst Fe3O4@ rGO‑NH
(주)코리아스칼라
- 최초 등록일
- 2023.05.22
- 최종 저작일
- 2023.02
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 1호
ㆍ저자명 : Esmail Rezaei‑Seresht, Fatemeh Tafazzoli Gazkoh, Behrooz Maleki
목차
Abstract
1 Introduction
2 Results and discussion
2.1 Synthesis and characterization of catalyst Fe3O4@rGO-NH
2.2 FT-IR
2.3 TGA
2.4 XRD
2.5 TEM
2.6 VSM
3 Experimental
3.1 General
3.2 Synthesis of catalyst Fe3O4@rGO-NH
4 Experimental procedure for the Pechmann reaction (synthesis of compounds 2a-j)
4.1 7-Hydroxy-4-methyl-[2H]-chromen-2-one (2a)
4.2 7,8-Dihydroxy-4-methyl-[2H]-chromen-2-one (2b)
4.3 5,7-Dihydroxy-4-methyl-[2H]-chromen-2-one (2c)
4.4 7-Methoxy-4-methyl-[2H]-chromen-2-one (2d)
5 Conclusion
References
영어 초록
This work describes the synthesis and characterization of a heterogeneous catalyst consisting of piperazine-functionalized reduced graphene oxide decorated with Fe3O4 nanoparticles ( Fe3O4@rGO-NH), and the study of its catalytic activity as a magnetic heterogeneous catalyst for the Pechmann synthesis of coumarins. Catalyst Fe3O4@ rGO-NH was fully characterized by various techniques, including IR, XRD, TEM, VSM, TGA, and elemental analysis. Then, the catalyst was used as an efficient and easy-separable heterogeneous catalyst for the solvent-free synthesis of some coumarins by Pechmann reaction. The reaction was optimized in terms of reaction time and temperature, catalyst dosage, and the presence/absence of the solvent. Finally, the reusability of the catalyst was studied.
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