Reaktion #60655

Reaktionsgleichung

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

Ausbeute 75.3%

Lösungsmittel

dichloromethane

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITleft
2. 2
   Waschenwashed with saturated sodium bicarbonate solution (2×5 mL)
3. 3
   Trocknendried over magnesium sulfate
4. 4
   Einengenconcentrated under reduced pressure
5. 5
   SonstigeThe resulting residue was purified by column chromatography (12 g of silica gel eluted with 2% methanol in dichloromethane)

Vorschrift

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.

Quelle