Journal
POLYCYCLIC AROMATIC COMPOUNDS
Volume 43, Issue 4, Pages 3761-3775Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10406638.2022.2077775
Keywords
Pyrano[2; 3-c] pyrazoles; biodegradable ionic liquid; green Synthesis; Condensation reaction; cleaner reaction profile
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A green, efficient, and clean route for synthesizing biologically potent pyrano[2,3-c]pyrazole derivatives has been developed. The method utilizes a biodegradable ionic liquid [(EMIM)Ac] as a catalyst and involves a one-pot four-component condensation reaction in ethanol.
A Green, efficient and clean route for synthesis of biologically potent pyrano[2,3-c]pyrazole derivatives has been developed in excellent yield, by using biodegradable ionic liquid 1-ethyl 3-methyl imidazolium acetate [(EMIM)Ac)] as a green catalyst via one-pot four-component condensation reaction of ethyl-acetoacetate, hydrazine-hydrate, malononitrile and carbonyl compounds at reflux condition in ethanol. The striking features of the protocol are a cleaner reaction profile, mild experimental procedure, applicable to extensive range of substrates and short reaction time.
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