Journal of Sciences, Islamic Republic of Iran

One-pot, Multi-component Synthesis of Dihydropyrano(2,3-c)pyrazoles Catalysed by Preheated Fly-Ash in Aqueous Medium

Document Type : Original Paper

Authors

1 1 Department of Chemistry, University of Allahabad, Prayagraj, UP-211002, India

2 2 Department of Chemistry, CMP Degree College, Prayagraj (A constituent PG college of Unversity of Allahabad, Prayagraj) UP-211002, India

3 3 K.S. Saket P.G. College, A Government-Aided PG college of DR RML Avadh University, Ayodhya, UP-224123, India

Abstract

A facile one-pot multicomponent protocol for the synthesis of bio-active dihydropyrano(2,3-c)pyrazole derivatives from ethyl acetoacetate, hydrazine hydrate, malononitrile and aryl aldehydes using preheated-fly-ash as catalyst for the first time.These environmentally begin multicomponent cyclocondensations offer some interesting advantages, advantages of this methodology are the use of nontoxic solvent, cost-effective and easy availability of catalyst, ease of the work-up, high yields (up to 95%), and green protocol.

Keywords

Main Subjects

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Journal of Sciences, Islamic Republic of Iran
Volume 34, Issue 2
June 2023
Pages 129-136