Hydrochloric Acid → HCID 50991210, compound

Participants

Reaction Steps

Into a 50-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed a solution of (S)-methyl 2-phenyl-3-(1-phenylethylamino)quinoxaline-6-carboxylate (110 mg, 0.29 mmol, 1.00 equiv) in THF (9 mL), sodium hydride (137.9 mg, 5.74 mmol, 20.00 equiv, 60%). The resulting solution was stirred for 1 h at room temperature in an ice/salt bath. This was followed by the addition of a solution of CH3I (407.8 mg, 2.87 mmol, 10.00 equiv) THF (1 mL) dropwise with stiffing at 0° C. The resulting solution was stirred for overnight at 20° C. in an ice/salt bath. The pH value of the solution was adjusted to 3-4 with 1N hydrogen chloride. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with dichloromethane/methanol (10:1). This resulted in 40 mg (36%) of (S)-3-(methyl(1-phenylethyl)amino)-2-phenylquinoxaline-6-carboxylic acid as a yellow solid.

Provenance & Evidence