反应详情

To a solution of 2-(ethoxymethyl)-1-[(1-methoxycyclopentyl)methyl]-1H-imidazo[4,5-c]quinoline (0.30 g, 0.88 mmol) in dichloromethane at rt was added m-CPBA (278 mg, 0.88 mmol). The solution was stirred for 1.5 h and concentrated ammonium hydroxide (5.73 mL) was added and the mixture was cooled in an ice bath. To the mixture was added TsCl (176 mg, 0.924 mmol). The mixture was stirred 3 h at rt. Water (10 mL) was added and the mixture was extracted with dichloromethane (3×20 mL). The combined organics were washed twice with brine, dried over Na2SO4, filtered, and concentrated to a yellow oil. The crude product was purified by flash chromatography (silica gel, gradient elution with 1-10% CMA/CHCl3). The purified product was crystallized from acetonitrile to provide 2-(ethoxymethyl)-1-[(1-methoxycyclopentyl)methyl]-1H-imidazo[4,5-c]quinolin-4-amine as off white crystals (0.122 g, 39%) after vacuum drying at 80° C., mp 148.0-150.0° C.

1. temperaturethe mixture was cooled in an ice bath
2. stirringThe mixture was stirred 3 h at rt
3. extractionthe mixture was extracted with dichloromethane (3×20 mL)
4. washThe combined organics were washed twice with brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated to a yellow oil
8. customThe crude product was purified by flash chromatography (silica gel, gradient elution with 1-10% CMA/CHCl3)
9. customThe purified product was crystallized from acetonitrile