Trifluoroacetic acid → HCID 86627651, compound

Participants

Reaction Steps

Trifluoroacetic acid (10 mL) was added to a suspension of tert-butyl[2-(4-amino-2-isopropylideneaminooxymethyl-1H-imidazo[4,5-c]quinolin-1-yl)ethyl]carbamate (4.8 g) in dichloromethane (100 mL). The reaction became homogeneous and was stirred at ambient temperature. At 2.5 hours and 3.5 hours more trifluoroacetic acid (10 mL and 5 mL respectively) was added. After a total reaction time of 4 hours the reaction mixture was concentrated under reduced pressure. The residue was azeotroped with toluene (×3) and then placed under high vacuum overnight to provide 9.97 g of propan-2-one O-{[4-amino-1-(2-aminoethyl)-1H-imidazo[4,5-c]quinolin-2-yl]methyl}oxime as a yellow solid. Based on the weight this material was assumed to contain 5 equivalents of trifluoroacetic acid.

Provenance & Evidence