Triethylamine → 7-bromo-2-ethoxymethyl-1-{[1-(2-methylpropylcarbonyl)piperidin-4-yl]methyl}-1H-imidazo[4,5-c]quinolin-4-amine

Participants

Reaction Steps

A solution of 7-bromo-2-ethoxymethyl-1-(piperidin-4-ylmethyl)-1H-imidazo[4,5-c]quinolin-4-amine dihydrochloride (4.0 g, 8.1 mmol) and triethylamine (5.67 mL, 40.7 mmol) in chloroform (300 mL) was treated with isobutyryl chloride (0.85 mL, 8.1 mmol) according to the method described in Part A of Examples 583–611. The reaction was complete after one hour. Following trituration with ethyl acetate, the solid was recrystallized from ethyl acetate and then triturated with hot acetonitrile and isolated by filtration to provide 3.63 g of 7-bromo-2-ethoxymethyl-1-{[1-(2-methylpropylcarbonyl)piperidin-4-yl]methyl}-1H-imidazo[4,5-c]quinolin-4-amine as a white solid, mp 199–200° C.

Provenance & Evidence