Methanol → N-(2-{[4-amino-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]oxy}ethyl)-3-mercaptopropanamide

Participants

Reaction Conditions

Reaction Steps

A solution of 1-(2-aminoethoxy)-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-4-amine (30 mg, 0.10 mmol) and succinimido 3-(triphenylmethylthio)propanoate (54 mg, 0.12 mmol) in dichloromethane (1 mL) was stirred for 24 hours at room temperature. Methanol (1 mL) was added and stirring was continued for another 5 days. The mixture was filtered and the filtrate was concentrated. The residue was dissolved in dichloromethane (2 mL) and triethylsilane (0.16 mL) and cooled to 0° C. Trifluoroacetic acid (0.4 mL) was added. The solution was stirred for 30 min; then it was concentrated under reduced pressure. The crude product was purified by flash chromatography on silica gel (gradient elution with a solution of 2% ammonium hydroxide in methanol and chloroform) to provide 18.2 mg of N-(2-{[4-amino-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]oxy}ethyl)-3-mercaptopropanamide as a solid. HRMS (ESI) calcd for C18H24N5O3S+H 390.1600, found 390.1579.

Provenance & Evidence