(3S)-3-methyl-1-pyridin-2-ylpiperazine → (S)-methyl 3-(2-methyl-4-(pyridin-2-yl)piperazin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-3-methyl-1-(pyridin-2-yl)piperazine (748 mg, 4.22 mmol) in NMP (5 ml), was added methyl 3-chloro-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (1 g, 4.19 mmol). After stirring 1 h at 140° C., the resulting solution was quenched by the addition of water (100 ml) and filtered to give (S)-methyl 3-(2-methyl-4-(pyridin-2-yl)piperazin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as a yellow solid (1.07 g, 67%).

Provenance & Evidence