反应详情

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.

1. temperatureis heated to 140°-145° C. for 14 hours
2. customThe mixture is evaporated under vacuum, chloroform
3. additionis added
4. washthe solution is washed with water
5. dry with materialdried over sodium sulfate
6. customevaporated 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.
7. customare obtained