[摘要]：An electrochem. induced catalytic tandem Knoevenagel-Michael reaction of two equiv. of 5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one with various arom. aldehydes in ethanol in an undivided cell in the presence of sodium bromide as an electrolyte results in the formation of the corresponding 4,4'-(arylmethylene)bis(1H-pyrazol-5-ols) in 80-96% yields. The application of this efficient electrocatalytic method to the synthesis of biol. prominent 4,4'-(arylmethylene)bis(1H-pyrazol-5-ols) represents a facile and convenient approach to the realization of the tandem Knoevenagel-Michael reaction.
