1: aqueous potassium carbonate-solution; benzene / Erwaermen des in der Benzol-Phase geloesten 1-Benzyl-4-brom-4-<2-brom-aethyl>-piperidins 2: palladium/charcoal; methanol / Hydrogenation View Scheme

With  potassium carbonate; benzene  Erwaermen des in der Benzol-Phase geloesten 1-Benzyl-4-brom-4-<2-brom-aethyl>-piperidins;