4'-Hydroxypropiophenone → Ifenprodil hydrobromide

Participants

Reaction Steps

To 4 ml of dioxane were added 6.0 g of 4'-hydroxypropiophenone. 6.8 Grams of bromine were added dropwise to the mixture with stirring at room temperature, and the reaction liquid was stirred for an additional 10 minutes. To the reaction liquid were then added 14.3 g of 4-benzylpyridine and 100 ml of methanol, and the mixture was refluxed under heating for 3 hours. After stopping the heating, 0.5 g of platinum oxide were added and hydrogen was then introduced and the mixture was stirred for 12 hours under pressure of about 1 atm. After completion of the reaction, the reaction mixture was worked up in the same manner as described in Example 45, whereby 12.0 g (74.1%) of ifenprodil hydrobromide were obtained as white crystals.

Provenance & Evidence