Diisopropylethylamine → (R)-methyl 3-(sec-butylamino)-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 (0.5 g, 2.1 mmol) in DMSO (10 mL) was added (R)-butan-2-amine (570 mg, 7.79 mmol) and DIEA (850 mg, 6.58 mmol). The resulting solution was stirred for 4 hours at 70° C. and then quenched by the addition of water (50 mL). The solids were collected by filtration to afford (R)-methyl 3-(sec-butylamino)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as a white solid (425 mg, 75%).

Provenance & Evidence