Citation: Zahra Vafajoo, Nourallah Hazeri, Malek Taher Maghsoodlou, Hojat Veisi. Electro-catalyzed multicomponent transformation of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one to 1,4-dihydropyrano[2,3-c]pyrazole derivatives in green medium[J]. Chinese Chemical Letters, ;2015, 26(8): 973-976. doi: 10.1016/j.cclet.2015.04.016 shu

Electro-catalyzed multicomponent transformation of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one to 1,4-dihydropyrano[2,3-c]pyrazole derivatives in green medium

1.
a Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan 98135-674, Iran;
2.
b Department of Chemistry, Payame Noor University, Tehran 19395-4697, Iran

Corresponding author: Zahra Vafajoo, Nourallah Hazeri,
Received Date: 1 February 2015
Available Online: 19 March 2015
Fund Project:

An efficient and convenient synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives is described, using the electrogenerated anion of ethanol as the base in the presence of sodium bromide as an supporting electrolyte in a one-pot, three component condensation of malononitrile, aromatic aldehydes and 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one. The reaction is carried out in an undivided cell containing an iron electrode as the cathode and a graphite electrode as the anode, at a constant current at room temperature.
- 1,4-Dihydropyrano[2,3-c]pyrazole,
- Multicomponent,
- Electrosynthesis
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