Hydrogen Bromide → HCID 14012880, compound

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Reaction Steps

A solution of 22.3 parts of 1-[(4-fluorophenyl)methyl]-5-methoxy-2-(4-piperidinylmethyl)-1H-benzimidazole dihydrochloride.monohydrate in 75 parts of a hydrobromic acid solution 48% in water was stirred and refluxed for 18 hours. The whole was slightly cooled and evaporated. The residue was dissolved in water. The solution was treated with an ammonium hydroxide solution. The product was extracted three times with trichloromethane. The combined organic layers were washed with water, dried, filtered and evaporated, yielding 15.7 parts (92%) of 1-[(4-fluorophenyl)methyl]-2-(4-piperidinylmethyl)-1H-benzimidazol-5-ol; mp. 210° C. (78).

Provenance & Evidence