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Abstract
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ABSTRACT: A green and convenient approach for the
synthesis of 4,4-(arylmethylene)bis (3-methyl-1-phenyl-1Hpyrazol-5-ols)
by the reaction of aromatic aldehydes, phenylhydrazine
derivatives, and ethyl acetoacetate in water/ethanol
(1/1) under ultrasound irradiation is described. This method
provides several advantages such as environmental friendliness,
shorter reaction time, excellent yields, and simple workup
procedure.
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