Dimethylformamide → 2-(2,5-Difluorophenylthio)-5-methoxy-benzaldehyde

関与物質

反応条件

反応手順

A mixture of 19.7 g of 2-bromo-5-methoxybenzaldehyde (of Example 9, reference above), 14.1 g of 2,5-difluorothiophenol (of Example 11, reference above), 14.0 g of potassium carbonate, 75 ml dimethylformamide and 2.1 g of copper catalyst is stirred and heated to 150° C. for 6 hours. It is then diluted with 150 ml of water and extracted with benzene. The extract is washed with water, dried with magnesium sulfate and evaporated. The residue is processed by distillation. There are obtained 13.3 g (52%) of 2-(2,5-difluorophenylthio)-5-methoxy-benzaldehyde boiling at 163°-165° C./40 Pa. The product is crystallized from cyclohexane and melts in a pure state at 67°-68° C.

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