反应详情

Triethylamine (0.07 mL, 0.5 mmol) was added to a solution of 1-(4-aminobutyl)-2-butyl-6,7-dimethyl-1H-imidazo[4,5-c]pyridin-4-amine (150 mg, 0.5 mmol) in dichloromethane (150 mL). The reaction mixture was cooled in an ice bath. Benzoyl chloride (0.07 mL, 0.5 mmol) was added and the reaction mixture was removed from the ice bath. The reaction mixture was washed twice with water and then concentrated under reduced pressure. The resulting residue was purified by flash chromatography eluting with 10% methanol in dichloromethane to provide an oily brown material. This material was dissolved in a minimum amount of isopropanol and then ethanesulfonic acid (55 mg, 0.5 mmol) was added with stirring. The reaction mixture was stirred at ambient temperature for ˜1 hour and then heated briefly in a sand bath until it became homogeneous. The solution was allowed to cool to ambient temperature and then was chilled in an ice bath. The resulting precipitate was isolated by filtration to provide 111 mg of N-[4-(4-amino-2-butyl-6,7-dimethyl-1H-imidazo[4,5-c]pyridin-1-yl)butyl]benzamide as a crystalline solid, m.p. 127.8–128.8° C.

1. temperatureThe reaction mixture was cooled in an ice bath
2. customthe reaction mixture was removed from the ice bath
3. washThe reaction mixture was washed twice with water
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue was purified by flash chromatography
6. washeluting with 10% methanol in dichloromethane
7. customto provide an oily brown material
8. stirringThe reaction mixture was stirred at ambient temperature for ˜1 hour
9. temperatureheated briefly in a sand bath until it
10. temperaturewas chilled in an ice bath
11. customThe resulting precipitate was isolated by filtration