Diisopropylethylamine → Methyl 3-(cyclopropyl(methyl)amino)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-chloro-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (300 mg, 1.26 mmol) in DMSO (2 mL), was added N-methylcyclopropanamine hydrochloride (175 mg, 1.63 mmol) and DIEA (325 mg, 2.52 mmol) with stirring for 2 h at 75° C. in an oil bath. Then the reaction was quenched by the addition of water (10 mL) to give the precipitate, which was collected by filtration to afford methyl 3-[cyclopropyl(methyl)amino]-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as an off-white solid (297 mg, 86%).

Provenance & Evidence