4'-Hydroxypropiophenone → Ifenprodil

Beteiligte Stoffe

Reaktionsschritte

To 15 ml of di-n-butyl ether were added 6.0 g of 4'-hydroxypropiophenone. 6.6 Grams of bromine were added dropwise to the mixture with stirring at room temperature. The reaction liquid was stirred for an additional 10 minutes and then nitrogen was introduced thereinto at a flow rate of 200 ml/minute for one hour at room temperature. To the treaction liquid were then added 7.5 g of 4-benzylpyridine and 100 ml of methanol, and the mixture was refluxed under heating for 5 hours. After stopping the heating, the reaction mixture was treated in the same manner as described in Example 35, whereby 11.3 g (73.4%) of ifenprodil were obtained as white crystals.

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