Trifluoroacetic acid → HCID 68920940, compound

Participants

Reaction Steps

Trifluoroacetic acid (30 mL) was added slowly to a solution of tert-butyl 6-({2-[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-1,1-dimethylethyl}amino)-6-oxohexylcarbamate (3.99 g, 7.82 mmol) in dichloromethane (80 mL) at room temperature. After 1.5 hours, the solution was concentrated under reduced pressure to afford an oil. The oil was dissolved in a small amount of water and concentrated ammonium hydroxide. The resulting basic mixture was extracted with dichloromethane multiple times. The combined organic extracts were dried over sodium sulfate, filtered, and concentrated under reduced pressure to afford 3.4 g of 6-amino-N-{2-[2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-1,1-dimethylethyl}hexanamide, which was used in the next step without further purification.

Provenance & Evidence