Diisopropylethylamine → (S)-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 (200 mg, 0.84 mmol) in DMSO (2 mL) was added (S)-butan-2-amine (93 mg, 1.27 mmol) and DIEA (163 mg, 1.26 mmol). The resulting solution was stirred for 3 hours at 70° C. and then quenched by the addition of water (10 mL). The solids were collected by filtration to afford (S)-methyl 3-(sec-butylamino)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as light yellow solid (150 mg, 65%).

Provenance & Evidence