1-Methylimidazole → HCID 86658954, compound

Participants

Reaction Steps

To a solution of 200 mg of t-butyl 1,2,3,4,6,7,9,10-octahydro-8H-azepino[4,5-g]quinoline-8-carboxylate in 6 ml of dichloromethane were added 0.148 ml of triethylamine, 0.093 ml of ethanesulfonyl chloride, and 54 mg of 1-methylimidazole under ice-cooling, followed by stirring at room temperature overnight. To the reaction mixture were added EtOAc and saturated brine, and the organic layer was washed with saturated brine and then concentrated under reduced pressure. The residue was purified by silica gel chromatography (elution solvent: HEX-EtOAc). The resulting substance was dissolved in 4 ml of chloroform, followed by adding 2 ml of trifluoroacetic acid and stirring for 30 minutes. After concentration under reduced pressure, the resultant was dissolved in 4.5 ml of EtOH, neutralized by the addition of triethylamine, and then concentrated under reduced pressure. Then, the residue was purified by silica gel column chromatography (elution solvent: chloroform-MeOH-aqueous ammonia). The resulting substance was dissolved in EtOH and 76 mg of fumaric acid was added thereto. The resulting white solid was collected by filtration and dried to obtain 61 mg of 1-(ethylsulfonyl)-2,3,4,6,7,8,9,10-octahydro-1H-azepino[4,5-g]quinoline monofumarate.

Provenance & Evidence