Potassium Iodide → HCID 21500240, compound

Participants

Reaction Steps

A mixture of 9.35 parts of 1-chloro-4-phenyl-4-(3-trifluoromethylphenyl)butane, 6.3 parts of 5-chloro-1-(4-piperidyl)-2-benzimidazolinone, 6.35 parts of sodium carbonate, 0.1 parts of potassium iodide and 200 parts of 4-methyl-2-pentanone is stirred and refluxed overnight with water-separator. After cooling to room temperature, water is added and the layers are separated. The organic phase is dried, filtered and evaporated. The oily residue is purified by column-chromatography over silicagel, using a mixture of trichloromethane and 5% of methanol as eluent. The pure fractions are collected and the eluent is evaporated. The residue is crystallized from 4-methyl-2-pentanone, yielding 5-chloro-1,3-dihydro-1-[1-{4-phenyl-4-[3-(trifluoromethyl)phenyl]butyl}4-piperidinyl]-2H-benzimidazol-2-one hydrate; mp. 114.9° C.

Provenance & Evidence