Journal
RESEARCH ON CHEMICAL INTERMEDIATES
Volume 41, Issue 9, Pages 6843-6858Publisher
SPRINGER
DOI: 10.1007/s11164-014-1782-7
Keywords
Pyrazole; Crown ether functionalized ionic liquid; Solvent-free conditions; beta-enaminone
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Funding
- UGC New Delhi [41-211/2012(SR)]
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An innovatively designed novel crown ether functionalized imidazolium-based reusable acidic ionic liquid [crown ether MIm][HSO4] has been efficiently implemented for the synthesis of pyrazole derivatives using various substituted enaminones, hydrazine hydrate and phenyl hydrazine under solvent-free conditions. Structural novelty and task efficiency of the catalyst, high yields of desired products, greener approach attributing high atom economy and solvent-free conditions render this protocol suitable to cope with the current demand in contemporary organic chemistry. The inventive idea of utilizing crown ether functionalized ionic liquid as a catalyst was for the first time demonstrated in this protocol.
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