Diisopropylethylamine → (S)-methyl 7-methoxy-3-(2-methylpyrrolidin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-chloro-7-methoxy-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (1.2 g, 4.47 mmol) in DMSO (20 ml) was added DIEA (1.16 g, 8.98 mmol) and methylpyrrolidine hydrochloride (650 mg, 5.35 mmol), and the reaction was stirred at 85° C. overnight. The reaction mixture was cooled to room temperature. The product was precipitated by the addition water, and the solids were collected by filtration to afford (S)-methyl 7-methoxy-3-(2-methylpyrrolidin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as a light yellow solid (1.0 g, 71%).

Provenance & Evidence