EtifelmineEtifelmine is a stimulant drug. It was used for the treatment of hypotension.SynthesisThe base-catalyzed reaction between benzophenone and butyronitrile gives 2-butanenitrile. Catalytic hydrogenation reduces the nitrile group to a primary amine giving 1,1-diphenyl-2-ethyl-3-aminopropanol. The tertiary hydroxyl group is dehydrated by treatment with anhydrous hydrogen chloride gas, completing the synthesis of etifelmine.