Triethylamine → HCID 11474441, compound

Participants

Reaction Steps

Triethylamine (0.634 mL, 4.55 mmol) and methanesulfonyl chloride (0.211 mL, 2.73 mmol) were added to a solution of 1-{4-amino-2-[(aminooxy)methyl]-1H-imidazo[4,5-c]quinolin-1-yl}-2-methylpropan-2-ol (prepared as described in Example 100, 685 mg, 2.27 mmol) in DMF (5 mL). A solid formed immediately. The mixture was stirred for 3.5 hours at room temperature, then additional triethylamine (0.634 mL) and methanesulfonyl chloride (0.211 mL) were added. The reaction mixture was stirred for an additional 1.5 hours, then was partitioned between water (20 mL) and dichloromethane (30 mL). The aqueous layer was extracted with dichloromethane (2×30 mL). The organic layers were combined and allowed to stand overnight at room temperature. Crystals formed and were isolated by filtration to provide 40 mg of N-{[4-amino-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-2-yl]methoxy}methanesulfonamide. Additional crystals were isolated from the mother liquor after a seed crystal was added. The two crops were combined and dried in a vacuum oven to provide 160 mg of N-{[4-amino-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-2-yl]methoxy}methanesulfonamide as pale yellow crystals, mp 232-234° C.

Provenance & Evidence