Sodium Carbonate → 3-(aminocarbonyl)-4-[5,5-bis(4-fluorophenyl)pentyl]-N-(2,4,6-trimethyl-3-pyridinyl)-1-piperazineacetamide trihydrochloride

Participants

Reaction Conditions

Reaction Steps

A mixture of 6.1 parts of 1-[5,5-bis(4-fluorophenyl)pentyl]-2-piperazinecarboxamide, 4.3 parts of 2-chloro-N-(2,4,6-trimethyl-3-pyridinyl)acetamide monohydrochloride, 3.7 parts of sodium carbonate and 90 parts of N,N-dimethylformamide was stirred for 15 hours at 70° C. The reaction mixture was filtered, washed with N,N-dimethylformamide and the filtrate was evaporated in vacuo. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (92.5:7.5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was further purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was converted into the hydrochloride salt in 2-propanone and 2-propanol. The salt was filtered off, washed twice with 2-propanone and once with 2,2'-oxybispropane and dried overnight at 100°-110° C., yielding 6.58 parts (61.2%) of 3 -(aminocarbonyl)-4-[5,5-bis(4-fluorophenyl)pentyl]-N-(2,4,6-trimethyl-3-pyridinyl)-1-piperazineacetamide trihydrochloride, hemihydrate; mp. 224.7° C. (compound 115).

Provenance & Evidence