反应详情

46 mg (0.2 mmol) of the 1-(3,4-dimethylphenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-carbaldehyde synthesized in 1) and 34 mg (0.20 mmol) of 2,4-dihydroxybenzoic hydrazide were stirred in 1 ml of ethanol at room temperature for 96 hours. The precipitated solid was collected by filtration and washed with 1 ml of ethanol, 1 ml of ether and 1 ml of methanol successively to obtain 53 mg of the desired product (yield 70%).

1. filtrationThe precipitated solid was collected by filtration
2. washwashed with 1 ml of ethanol, 1 ml of ether and 1 ml of methanol successively