Synthesis of Pyrazolopyranopyrimidine and Dihydropyrano[2,3-c]Pyrazole Derivatives Using Fe3O4@THAM-Piperazine as a Superparamagnetic Nanocatalyst under Green Condition
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作者:
Mir, Fatemeh
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Univ Sistan & Baluchestan, Fac Sci, Dept Chem, POB 98135-674, Zahedan, IranUniv Sistan & Baluchestan, Fac Sci, Dept Chem, POB 98135-674, Zahedan, Iran
Mir, Fatemeh
[1
]
Hazeri, Nourallah
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Univ Sistan & Baluchestan, Fac Sci, Dept Chem, POB 98135-674, Zahedan, IranUniv Sistan & Baluchestan, Fac Sci, Dept Chem, POB 98135-674, Zahedan, Iran
Hazeri, Nourallah
[1
]
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Maghsoodlou, Malek Taher
[1
]
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Lashkari, Mojtaba
[2
]
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[1] Univ Sistan & Baluchestan, Fac Sci, Dept Chem, POB 98135-674, Zahedan, Iran
In this article, a new and simple procedure was designed for the preparation of pyrazolopyranopyrimidine and dihydropyrano[2,3-c]pyrazole derivatives using the reaction between hydrazine hydrate, aryl aldehydes, malononitrile or barbituric acid, and ethyl acetoacetate using Fe3O4@THAM-piperazine as a solid nanocatalyst in a solution of water and ethanol at 60 degrees C. The present process offers advantages like easy workup, short reaction time, non-toxicity, and the use of green solvent. Moreover, recyclability studies were carried out that showed a high potential of reusing and recovering capability.