تفاعل #9490

معادلة التفاعل

2-ethoxymethyl-1-(piperidin-4-ylmethyl)-7-(pyridin-3-yl)-1H-imidazo[4,5-c]quinolin-4-amine trihydrochloride

triethylamine

2-Tetrahydrofuroic acid

1-(3-dimethoxyaminopropyl)-3-ethylcarbodiimide hydrochloride

1-hydroxybenzotriazole

→

2-ethoxymethyl-7-(pyridin-3-yl)-1-{[1-(tetrahydrofuran-2-ylcarbonyl)piperidin-4-yl]methyl}-1H-imidazo[4,5-c]quinolin-4-amine

المردود 69.5%

المذيبات

chloroform

chloroform

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةto warm to ambient temperature
2. 2
   workup.STIRRINGstirred for 16 hours
3. 3
   غسيلThe resulting solution was washed sequentially with water (100 mL), 4% aqueous sodium carbonate (2×100 mL), water (200 mL), and brine (150 mL)
4. 4
   تجفيفdried over sodium sulfate
5. 5
   ترشيحfiltered
6. 6
   تركيزand concentrated under reduced pressure
7. 7
   أخرىThe residue was purified by HPFC
8. 8
   أخرىfollowed by recrystallization from ethyl acetate

الإجراء التجريبي

A solution of 2-ethoxymethyl-1-(piperidin-4-ylmethyl)-7-(pyridin-3-yl)-1H-imidazo[4,5-c]quinolin-4-amine trihydrochloride (1.0 g, 1.90 mmol) and triethylamine (1.35 mL, 9.50 mmol) in chloroform (80 mL) was cooled to 4° C. 2-Tetrahydrofuroic acid (0.243 g, 2.09 mmol) and 1-(3-dimethoxyaminopropyl)-3-ethylcarbodiimide hydrochloride (0.401 g, 2.09 mmol) were sequentially added, and the reaction was stirred for two hours. The reaction was incomplete as determined by thin layer chromatography (TLC) analysis. The reaction was cooled to 4° C., and 1-hydroxybenzotriazole (0.283 g, 2.09 mmol) was added. The reaction was allowed to warm to ambient temperature, stirred for 16 hours, and then diluted with chloroform (100 mL). The resulting solution was washed sequentially with water (100 mL), 4% aqueous sodium carbonate (2×100 mL), water (200 mL), and brine (150 mL); dried over sodium sulfate; filtered; and concentrated under reduced pressure. The residue was purified by HPFC followed by recrystallization from ethyl acetate to provide 0.68 g of 2-ethoxymethyl-7-(pyridin-3-yl)-1-{[1-(tetrahydrofuran-2-ylcarbonyl)piperidin-4-yl]methyl}-1H-imidazo[4,5-c]quinolin-4-amine as a white, crystalline solid, mp 191–192° C.

المصدر