Sodium Chloride → 1-(3-Chloropropyl)-4-phenylpiperidine

Participants

Reaction Steps

24 Grams of 4-phenylpiperidine, 24 g of 1-chloro-3-bromopropane and 15 g of triethylamine were mixed with 100 ml of dimethylformamide and stirred at 50°-60° C. for 1 hour. The reaction mixture was poured into 200 ml of saturated sodium chloride aqueous-solution and the organic layer was extracted with chloroform. Then the chloroform layers was washed with water, dried and the chloroform was removed by distillation. The residue thus obtained was purified by a silica-gel column chromatography (to obtain only the main product at the upper-most portion in the column). 15.3 Grams of 1-chloro-3-(4-phenylpiperidinyl)propane was obtained as in the form of colorless oily substance. Then this oily substance was distilled under a reduced pressure to obtain 11 g of a fraction of distillate having the boiling point of 112°-115° C. (0.1 mmHg). A part of this distillate was made as in the form of hydrochloride and recrystallized from ethanol to obtain 1-chloro-3-(4-phenyl-1-piperidyl)propane monohydrochloride having the melting point of 167°-169° C. as in the form of colorless needle-like crystals.

Provenance & Evidence