1-Phenyl and 1-methyl derivative of 3-methyl-5-pyrazolone were prepared quantitatively via ascalable solvent-free reaction of corresponding hydrazine derivative with ethyl acetoacetate. Differentmechanisms have been proposed for the reaction of hydrazine derivatives (methyl or phenyl) with ethylacetoacetate and also the tautomeric aspects of the targeted compounds have been discussed.
Synopsis: 13C NMR and quantitative proportional amount of different tautomeric forms of 1,3-dimethyl-5-pyrazolone in DMSO-d6.
Volume 133, 2021
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