(3-Bromopropyl)benzene → 1-[4-(3-Phenylpropoxy)-1-piperidinyl]ethanone

Participants

Reaction Steps

1-Acetylpiperidin-4-ol (Preparation 193, 8 g, 60 mmol) in N,N-dimethylformamide (50 ml) was added dropwise to a stirred suspension of sodium hydride (50% wt dispersion in oil, 3.68 g, 80 mmol) in N,N-dimethylformamide (50 ml) at room temperature under nitrogen. After stirring the reaction mixture for 4 hours, 1-bromo-3-phenylpropane (12.94 g, 65 mmol) in N,N-dimethylformamide (50 ml) was added dropwise to the solution at 0° C. and the reaction mixture was stirred for a further 4 h. The solution was diluted with isopropyl alcohol (20 ml) and water (100 ml) and then evaporated to give a semi solid. Water (100 ml) was added and the solution was extracted with petroleum ether (3×100 ml). The combined organic extracts were dried (Na2SO4) and concentrated in vacuo to give an orange oil (4.3 g, 27%).

Provenance & Evidence