Methyl vinyl sulfone → 2-(ethoxymethyl)-1-({1-[2-(methylsulfonyl)ethoxy]cyclobutyl}methyl)-1H-imidazo[4,5-c]quinoline

Participants

Reaction Steps

1,8-Diazabicyclo[5.4.0]undec-7-ene (0.10 mL, 0.74 mmol) followed by methyl vinyl sulfone (1.60 g, 14.8 mmol) were added to a stirred solution of 1-{[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]methyl}cyclobutanol (2.30 g, 7.39 mmol) in tetrahydrofuran (30 mL). The reaction mixture was stirred at room temperature for 1 hour and a small amount of sodium hydride (60% dispersion in mineral oil) was added. Water (50 mL) was added and the mixture was extracted with ethyl acetate (3×50 mL). The organic layers were combined, washed with brine, dried over sodium sulfate, filtered, and concentrated under reduced pressure to afford an oil that was purified by flash chromatography (silica gel, eluted with 5% methanol in dichloromethane) to provide 2.0 g of 2-(ethoxymethyl)-1-({1-[2-(methylsulfonyl)ethoxy]cyclobutyl}methyl)-1H-imidazo[4,5-c]quinoline as an oil.

Provenance & Evidence