3-Isopropoxy-4-methoxybenzaldehyde → HCID 9863181, compound

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Reaction Steps

Under reflux, 20 ml of methanol solution containing 4.27 g of 3-isopropoxy-4 -methoxybenzaldehyde and 10.81 g of ferric chloride hexahydrate was added dropwise to 35 ml of methanol solution containing 3.50 g of 4-(1,2,4-triazol-1-yl)-o-phenylenediamine obtained in Reference Example 2. The resulting mixture was refluxed for 1 hour and then cooled, and the insoluble matter was collected by filtration. This was suspended in ethyl acetate/water and alkalified with liquid ammonia, and then the insoluble matter was removed by Celite filtration. The ethyl acetate layer was collected and dried over magnesium sulfate, and then the solvent was evaporated. By crystallizing the resulting residue with ethyl acetate/hexane, 4.92 g (70%) of the title compound was obtained. Its physical property values coincided with the data obtained in the above step (1).

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