反応 #60655

反応方程式

triethylamine

1-[2-(2-aminoethoxy)ethyl]-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-4-amine

Palmitoyl chloride

→

N-(2-{2-[4-amino-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl]ethoxy}ethyl)hexadecanamide

収率 75.3%

溶媒

dichloromethane

dichloromethane

反応条件

後処理

1. 1
   workup.WAITleft
2. 2
   洗浄washed with saturated sodium bicarbonate solution (2×5 mL)
3. 3
   乾燥dried over magnesium sulfate
4. 4
   濃縮concentrated under reduced pressure
5. 5
   その他The resulting residue was purified by column chromatography (12 g of silica gel eluted with 2% methanol in dichloromethane)

実験手順

Under a nitrogen atmosphere, a suspension of 1-[2-(2-aminoethoxy)ethyl]-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-4-amine (140.5 mg, 0.428 mmol) in a mixture of dichloromethane (3.5 mL) and triethylamine (150 μL, 1.07 mmol) was cooled to 0° C. Palmitoyl chloride (130 μL, 0.428 mmol) was slowly added. The reaction mixture was allowed to stir at 0° C. for 2 hours at which time analysis by thin layer chromatography indicated that there was no starting material left. The reaction mixture was diluted with dichloromethane (30 mL), washed with saturated sodium bicarbonate solution (2×5 mL), dried over magnesium sulfate and then concentrated under reduced pressure. The resulting residue was purified by column chromatography (12 g of silica gel eluted with 2% methanol in dichloromethane) to provide 183 mg of N-(2-{2-[4-amino-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl]ethoxy}ethyl)hexadecanamide as a white powder.

出典