Hydrochloric Acid → HCID 50992395, compound

Participants

Reaction Conditions

Reaction Steps

Into a 50-mL round-bottom flask, was placed a solution of methyl 3-(diethylamino)-2-phenylquinoxaline-6-carboxylate (117 mg, 0.35 mmol, 1.00 equiv) in methanol (15 mL). This was followed by the addition of a solution of sodium hydroxide (69.9 mg, 1.75 mmol, 5.00 equiv) in water (2 mL) dropwise with stiffing. The resulting solution was stirred overnight at 50° C. in an oil bath. The pH value of the solution was adjusted to 3-4 with 1N hydrogen chloride. The resulting mixture was concentrated under vacuum. The crude product (110 mg) was purified by Prep-HPLC with the following conditions: Column, SunFire Prep C18, 5 um, 19*150 mm; mobile phase, water with 0.05% TFA and methanol (70% methanol up to 90% in 10 min); Detector, UV 254 nm. This resulted in 70 mg (62%) of 3-(diethylamino)-2-phenylquinoxaline-6-carboxylic acid as a yellow solid.

Provenance & Evidence