Potassium Iodide → Ethyl 4-[5-(4-fluorophenyl)-5-(3-pyridinyl)pentyl]2-methyl-1-piperazinecarboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 14 parts of 3-[5-chloro-1-(4-fluorophenyl)pentyl]pyridine, 7.75 parts of ethyl 2-methyl-1-piperazinecarboxylate, 8.7 parts of N,N-diethylethanamine, 0.1 parts of potassium iodide and 198 parts of N,N-dimethylformamide was stirred for 40 hours at 70° C. The reaction mixture was evaporated and the residue was taken up in a mixture of water and sodium carbonate. The aqueous layer was extracted with trichloromethane. The extract was washed with a sodium carbonate solution in water and water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (98:2 by volume) as eluent. The pure fractions were collected and the eluent was evaporated, yielding 18 parts (96.7%) of ethyl 4-[5-(4-fluorophenyl)-5-(3-pyridinyl)pentyl]-2-methyl-1-piperazinecarboxylate as a residue (int. 38).

Provenance & Evidence