反应详情

温度

70 °C

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).

1. customThe reaction mixture was evaporated
2. additionthe residue was taken up in a mixture of water and sodium carbonate
3. extractionThe aqueous layer was extracted with trichloromethane
4. washThe extract was washed with a sodium carbonate solution in water and water
5. customdried
6. filtrationfiltered
7. customevaporated
8. customThe residue was purified by column chromatography over silica gel using
9. additiona mixture of trichloromethane and methanol (98:2 by volume) as eluent
10. customThe pure fractions were collected
11. customthe eluent was evaporated