Benzimidazole → 1-{4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl}-1H-benzimidazole

Participants

Reaction Steps

A mixture of 450 g (1.50 moles) of 8-(2-pyrimidinyl)-8-aza-5-azoniaspiro[4,5]decane bromide, 177 g (1.50 moles) of benzimidazole and 307 g (2.25 moles) of potassium carbonate in 2 l of dimethylformamide is heated to 140°-145° C. for 14 hours. The mixture is evaporated under vacuum, chloroform is added, the solution is washed with water, dried over sodium sulfate and evaporated under vacuum, and 457 g (91%) of 1-{4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl}-1H-benzimidazole, with a melting point of 85°-88° C., are obtained.

Provenance & Evidence